Counter-intuitive formulas?

What is the basis for reason? And mathematics?

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Speakpigeon
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Counter-intuitive formulas?

Post by Speakpigeon » Sat Nov 09, 2019 10:17 am

Are there propositional logic formulas, outside self-referential ones, whose validity or invalidity is often perceived as counter-intuitive?
EB

Impenitent
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Joined: Wed Feb 10, 2010 2:04 pm

Re: Counter-intuitive formulas?

Post by Impenitent » Sat Nov 09, 2019 10:38 pm

number systems are intuitively counters...

-Imp

Eodnhoj7
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Re: Counter-intuitive formulas?

Post by Eodnhoj7 » Sat Nov 09, 2019 11:19 pm

Speakpigeon wrote:
Sat Nov 09, 2019 10:17 am
Are there propositional logic formulas, outside self-referential ones, whose validity or invalidity is often perceived as counter-intuitive?
EB
This would require a strict assertion where one logical formula is dependent upon another, yet neither are connected.

wtf
Posts: 917
Joined: Tue Sep 08, 2015 11:36 pm

Re: Counter-intuitive formulas?

Post by wtf » Sun Nov 10, 2019 10:48 pm

Speakpigeon wrote:
Sat Nov 09, 2019 10:17 am
Are there propositional logic formulas, outside self-referential ones, whose validity or invalidity is often perceived as counter-intuitive?
EB
https://xkcd.com/179/

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