### Counter-intuitive formulas?

Posted:

**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

EB

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Posted: **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

EB

Posted: **Sat Nov 09, 2019 10:38 pm**

number systems are intuitively counters...

-Imp

-Imp

Posted: **Sat Nov 09, 2019 11:19 pm**

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

EB

Posted: **Sun Nov 10, 2019 10:48 pm**

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

EB