Logic and Philosophy of Mathematics

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Last post

The Number System as a Model of The Process of Evolution

Last post by wtf « Thu Jul 11, 2019 12:22 am
Replies: 68
by roydop » Thu Feb 28, 2019 3:04 pm
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Last post by wtf
Thu Jul 11, 2019 12:22 am
Why Philosophers Should Care About Computational Complexity

Last post by Eodnhoj7 « Mon Jul 08, 2019 4:43 pm
Replies: 31
by Univalence » Wed Jun 05, 2019 6:40 am
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Last post by Eodnhoj7
Mon Jul 08, 2019 4:43 pm
Is this simplest version of the Liar Paradox: ∃LP (LP ↔ ⊢¬LP) refutable?

Last post by Eodnhoj7 « Fri Jun 07, 2019 6:38 pm
Replies: 5
by PeteOlcott » Mon May 27, 2019 4:48 pm

5 Replies

189 Views

Last post by Eodnhoj7
Fri Jun 07, 2019 6:38 pm
Mathematics = Maya

Last post by PeteJ « Fri Jun 07, 2019 4:50 pm
Replies: 7
by roydop » Tue Mar 05, 2019 3:00 pm

7 Replies

236 Views

Last post by PeteJ
Fri Jun 07, 2019 4:50 pm
Any science of logic?

Last post by RCSaunders « Fri May 31, 2019 7:01 pm
Replies: 105
by Speakpigeon » Sun May 12, 2019 6:10 pm
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Last post by RCSaunders
Fri May 31, 2019 7:01 pm
Can truth be understood as math?

Last post by Speakpigeon « Mon May 27, 2019 12:35 pm
Replies: 2
by PeteOlcott » Mon May 27, 2019 4:54 am

2 Replies

107 Views

Last post by Speakpigeon
Mon May 27, 2019 12:35 pm
How do we say this using the notation conventions of mathematical logic?

Last post by Speakpigeon « Sun May 26, 2019 5:59 pm
Replies: 6
by PeteOlcott » Sat May 25, 2019 7:05 pm

6 Replies

188 Views

Last post by Speakpigeon
Sun May 26, 2019 5:59 pm
A junior high school level of understanding of logic

Last post by Univalence « Sat May 25, 2019 4:43 pm
Replies: 31
by PeteOlcott » Wed May 22, 2019 4:28 pm
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596 Views

Last post by Univalence
Sat May 25, 2019 4:43 pm
Tarski undefinability totally refuted by junior high school logic

Last post by PeteOlcott « Thu May 23, 2019 4:11 am

by PeteOlcott » Thu May 23, 2019 4:11 am

0 Replies

89 Views

Last post by PeteOlcott
Thu May 23, 2019 4:11 am
How can this possibly fail to partition True(x) from Untrue(x) for every formal system?

Last post by PeteOlcott « Wed May 22, 2019 8:14 pm

by PeteOlcott » Wed May 22, 2019 8:14 pm

0 Replies

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Last post by PeteOlcott
Wed May 22, 2019 8:14 pm
Refuting Gödel's 1931 Incompleteness Theorem in one sentence

Last post by PeteOlcott « Tue May 21, 2019 5:09 pm
Replies: 120
by PeteOlcott » Thu May 16, 2019 3:30 pm
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Last post by PeteOlcott
Tue May 21, 2019 5:09 pm
Does anyone here actually understand formal proofs of mathematical logic?

Last post by PeteOlcott « Sat May 18, 2019 5:50 pm
Replies: 122
by PeteOlcott » Mon May 13, 2019 10:23 pm
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Last post by PeteOlcott
Sat May 18, 2019 5:50 pm
Possible consequences of falsifying the principle of explosion?

Last post by PeteOlcott « Sun May 12, 2019 12:19 am
Replies: 86
by Speakpigeon » Wed May 01, 2019 12:22 pm
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2203 Views

Last post by PeteOlcott
Sun May 12, 2019 12:19 am
Further demonstration the law of identity is broken (Sophists welcome)

Last post by Eodnhoj7 « Mon May 06, 2019 5:50 pm
Replies: 84
by Logik » Mon Mar 04, 2019 9:07 am
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1799 Views

Last post by Eodnhoj7
Mon May 06, 2019 5:50 pm
Converting formal proofs to conform to sound deduction

Last post by Speakpigeon « Sat May 04, 2019 9:47 pm
Replies: 30
by PeteOlcott » Tue Apr 30, 2019 4:03 pm
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1568 Views

Last post by Speakpigeon
Sat May 04, 2019 9:47 pm
Tarski Undefinability Theorem Succinctly Refuted

Last post by wtf « Thu May 02, 2019 7:14 am
Replies: 106
by PeteOlcott » Tue Apr 02, 2019 9:48 pm
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2088 Views

Last post by wtf
Thu May 02, 2019 7:14 am
Transforming formal proof into sound deduction (greatly simplified)

Last post by Speakpigeon « Wed May 01, 2019 5:21 pm
Replies: 59
by PeteOlcott » Mon Apr 22, 2019 6:47 am
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1092 Views

Last post by Speakpigeon
Wed May 01, 2019 5:21 pm
Eliminating Undecidability and Incompleteness in Formal Systems (As simple as possible)

Last post by Logik « Tue Apr 30, 2019 11:45 am
Replies: 33
by PeteOlcott » Fri Apr 26, 2019 2:53 pm
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603 Views

Last post by Logik
Tue Apr 30, 2019 11:45 am
Transforming formal proof into sound deduction (rewritten)

Last post by Logik « Thu Apr 25, 2019 5:13 pm
Replies: 78
by PeteOlcott » Fri Apr 19, 2019 3:59 pm
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78 Replies

1235 Views

Last post by Logik
Thu Apr 25, 2019 5:13 pm
Eliminating Undecidability and Incompleteness in Formal Systems

Last post by wtf « Sun Apr 21, 2019 2:37 am
Replies: 62
by PeteOlcott » Mon Apr 15, 2019 9:00 pm
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1159 Views

Last post by wtf
Sun Apr 21, 2019 2:37 am
Gödel is really Wrong (totally rewritten)

Last post by PeteOlcott « Fri Apr 19, 2019 5:31 pm
Replies: 7
by PeteOlcott » Fri Apr 19, 2019 4:38 am

7 Replies

201 Views

Last post by PeteOlcott
Fri Apr 19, 2019 5:31 pm
Justification of the mathematical definition of logical validity?

Last post by Speakpigeon « Fri Apr 19, 2019 1:36 pm
Replies: 6
by Speakpigeon » Thu Apr 18, 2019 11:31 am

6 Replies

153 Views

Last post by Speakpigeon
Fri Apr 19, 2019 1:36 pm
Paradoxes of Material Implication

Last post by Logik « Wed Apr 17, 2019 11:52 pm
Replies: 62
by Garry G » Fri Apr 12, 2019 4:12 am
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1109 Views

Last post by Logik
Wed Apr 17, 2019 11:52 pm
If I can imagine it, it's logically possible?

Last post by Speakpigeon « Tue Apr 16, 2019 5:49 pm
Replies: 55
by Speakpigeon » Sat Mar 30, 2019 4:23 pm
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1124 Views

Last post by Speakpigeon
Tue Apr 16, 2019 5:49 pm
How paradoxical is this argument?

Last post by Speakpigeon « Tue Apr 16, 2019 4:55 pm
Replies: 4
by Garry G » Mon Apr 15, 2019 11:16 pm

4 Replies

138 Views

Last post by Speakpigeon
Tue Apr 16, 2019 4:55 pm
Eliminating undecidability in formal systems

Last post by Logik « Tue Apr 16, 2019 7:31 am
Replies: 72
by PeteOlcott » Tue Apr 09, 2019 2:25 am
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1143 Views

Last post by Logik
Tue Apr 16, 2019 7:31 am
Prolog already refutes Tarski Undefinability

Last post by Logik « Tue Apr 16, 2019 6:08 am
Replies: 60
by PeteOlcott » Fri Apr 12, 2019 8:11 pm
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1007 Views

Last post by Logik
Tue Apr 16, 2019 6:08 am
Definition of logical validity

Last post by Garry G « Sat Apr 13, 2019 9:12 pm
Replies: 55
by Speakpigeon » Wed Jan 23, 2019 2:47 pm
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1363 Views

Last post by Garry G
Sat Apr 13, 2019 9:12 pm
Is there a sentence that proves itself is not provable?

Last post by Logik « Tue Apr 09, 2019 7:30 am
Replies: 100
by PeteOlcott » Mon Mar 25, 2019 4:51 pm
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1874 Views

Last post by Logik
Tue Apr 09, 2019 7:30 am
Origins of Mathematical/Logical questions of computability...

Last post by Speakpigeon « Sat Apr 06, 2019 5:59 pm
Replies: 1
by Scott Mayers » Thu Apr 04, 2019 5:49 am

1 Replies

108 Views

Last post by Speakpigeon
Sat Apr 06, 2019 5:59 pm
Refuting Incompleteness and Undefinability

Last post by PeteOlcott « Fri Apr 05, 2019 4:18 pm
Replies: 102
by PeteOlcott » Thu Mar 21, 2019 10:43 pm
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2183 Views

Last post by PeteOlcott
Fri Apr 05, 2019 4:18 pm
The Riemann Hypothesis paradox

Last post by Logik « Fri Apr 05, 2019 9:02 am
Replies: 18
by attofishpi » Wed Apr 03, 2019 1:36 pm
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451 Views

Last post by Logik
Fri Apr 05, 2019 9:02 am
The logical error of the Liar Paradox

Last post by PeteOlcott « Thu Apr 04, 2019 12:10 am
Replies: 64
by PeteOlcott » Wed Mar 27, 2019 4:41 am
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1318 Views

Last post by PeteOlcott
Thu Apr 04, 2019 12:10 am
What is the purpose of computers?

Last post by Dontaskme « Tue Apr 02, 2019 10:58 am
Replies: 40
by Dontaskme » Fri Mar 22, 2019 8:53 am
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Last post by Dontaskme
Tue Apr 02, 2019 10:58 am
The arbitrary choice of the range/precision trade-off

Last post by Dontaskme « Fri Mar 22, 2019 2:19 pm
Replies: 5
by Logik » Fri Mar 22, 2019 12:38 pm

5 Replies

181 Views

Last post by Dontaskme
Fri Mar 22, 2019 2:19 pm
Vortex Math

Last post by Logik « Wed Mar 20, 2019 2:28 pm
Replies: 7
by Eodnhoj7 » Tue Mar 05, 2019 11:34 pm

7 Replies

262 Views

Last post by Logik
Wed Mar 20, 2019 2:28 pm
Contradicting the law of non-contradiction

Last post by Logik « Mon Mar 18, 2019 7:00 am
Replies: 40
by Logik » Sun Feb 24, 2019 2:11 pm
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920 Views

Last post by Logik
Mon Mar 18, 2019 7:00 am
An integer=a non-integer: Mathematics ends in contradiction

Last post by Logik « Sat Mar 16, 2019 9:19 am
Replies: 1
by anne » Sat Mar 16, 2019 3:17 am

1 Replies

106 Views

Last post by Logik
Sat Mar 16, 2019 9:19 am
The limitations of Aristotelian logic:LOGIC/ESSENCE AND LANGUAGE LEAD TO THE MEANINGLESSNESS OF ALL VIEWS

Last post by Eodnhoj7 « Tue Mar 12, 2019 9:59 pm
Replies: 41
by anne » Sat Mar 02, 2019 10:25 am
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Last post by Eodnhoj7
Tue Mar 12, 2019 9:59 pm
The death of Classical logic and the birth of Constructive Mathematics

Last post by Eodnhoj7 « Tue Mar 12, 2019 8:23 pm
Replies: 260
by Logik » Sat Feb 23, 2019 1:25 pm
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Last post by Eodnhoj7
Tue Mar 12, 2019 8:23 pm
The Classical law of identity (as stated) is inconsistent

Last post by Eodnhoj7 « Mon Mar 11, 2019 7:30 pm
Replies: 32
by Logik » Sat Mar 02, 2019 7:46 am
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773 Views

Last post by Eodnhoj7
Mon Mar 11, 2019 7:30 pm
Information is fundamental to cognition

Last post by commonsense « Wed Mar 06, 2019 11:42 pm
Replies: 53
by Logik » Tue Feb 26, 2019 8:52 am
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1039 Views

Last post by commonsense
Wed Mar 06, 2019 11:42 pm
Language(Logic), Geometry, Number Line are One through Chaos Theory

Last post by Eodnhoj7 « Wed Mar 06, 2019 10:55 pm
Replies: 17
by Eodnhoj7 » Mon Mar 04, 2019 10:31 pm
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Last post by Eodnhoj7
Wed Mar 06, 2019 10:55 pm
Let me convince you that none of you are Classical logicians!

Last post by Eodnhoj7 « Mon Mar 04, 2019 9:04 pm
Replies: 354
by Logik » Fri Feb 22, 2019 6:12 pm
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Last post by Eodnhoj7
Mon Mar 04, 2019 9:04 pm
Gödel’s 1st theorem is meaningless

Last post by Eodnhoj7 « Mon Mar 04, 2019 7:38 pm
Replies: 2
by anne » Wed Feb 27, 2019 11:06 am

2 Replies

121 Views

Last post by Eodnhoj7
Mon Mar 04, 2019 7:38 pm
The Purpose of Mathematics (Math as a message/model)

Last post by roydop « Sun Mar 03, 2019 11:21 pm

by roydop » Sun Mar 03, 2019 11:21 pm

0 Replies

167 Views

Last post by roydop
Sun Mar 03, 2019 11:21 pm
Mathematics ends in contradiction:6 reasons

Last post by Age « Sat Mar 02, 2019 5:35 pm
Replies: 136
by anne » Wed Feb 27, 2019 7:24 am
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Last post by Age
Sat Mar 02, 2019 5:35 pm
What the theorems of Incompleteness or Undecidability assert...

Last post by Scott Mayers « Sat Mar 02, 2019 7:31 am
Replies: 50
by Scott Mayers » Tue Feb 26, 2019 12:17 am
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Last post by Scott Mayers
Sat Mar 02, 2019 7:31 am
Godel's First Incompleteness theorem

Last post by Logik « Fri Mar 01, 2019 8:17 am
Replies: 2
by roydop » Fri Mar 01, 2019 1:00 am

2 Replies

118 Views

Last post by Logik
Fri Mar 01, 2019 8:17 am
Mathematics=natural/universal law. Counting=human influence.

Last post by Logik « Fri Mar 01, 2019 8:04 am
Replies: 2
by roydop » Fri Mar 01, 2019 12:06 am

2 Replies

123 Views

Last post by Logik
Fri Mar 01, 2019 8:04 am

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