Logic & Philosophy of Mathematics

How is it that you can divide 8 apples among two people but not 8 volts by 2 ohms?

by Alan June 06, 2019 at 18:29 35 comments

Are de re counterfactuals rigid?

by Shawn May 30, 2019 at 17:09 51 comments

Does logic and definition memory breed more logic?

by christian2017 May 27, 2019 at 09:15 7 comments

Looking to understand Non-validity more?

by Josh Alfred May 27, 2019 at 04:30 21 comments

Will Polling ever recover?

by orcestra May 26, 2019 at 08:55 10 comments

What is logic? How is it that it is so useful?

by schopenhauer1 May 25, 2019 at 00:16 109 comments

curved path 3rd dimension, straight path on a higher or lower dimension

by christian2017 May 24, 2019 at 03:45 11 comments

My partial solution to Lewis Carol's acrostic puzzle?

by ACRatone May 13, 2019 at 08:07 4 comments

Is mathematics discovered or invented

by Mephist May 05, 2019 at 12:19 68 comments

Musings On Infinity

by Devans99 May 05, 2019 at 12:16 303 comments

Is it possible to define a measure how 'interesting' is a theorem?

by Mephist May 05, 2019 at 11:20 26 comments

Cantor’s Paradox

by Devans99 April 30, 2019 at 06:49 38 comments

Poor Reasoning

by redan April 25, 2019 at 21:23 20 comments

Error in Russell's "On Denoting" exemple?

by Nicholas Ferreira April 10, 2019 at 01:36 3 comments

Is it self-contradictory to state 'there is no objective truth'?

by curiousnewbie April 07, 2019 at 03:03 295 comments

Can a tautology break the law of non-contradiction?

by Emils April 04, 2019 at 10:47 9 comments

Beginners question on deductive conclusions/analytic propositions

by Hume1739 March 31, 2019 at 21:42 9 comments

Strengthened Liar

by Pippen March 31, 2019 at 21:37 0 comments

Inductive Reasoning vs. Deductive Reasoning

by Joseph Walsh March 25, 2019 at 00:09 7 comments

Is it or isn't it?

by Deleted User March 17, 2019 at 19:03 20 comments

Casual Slippery Slope Exception

by Takashi March 16, 2019 at 16:45 1 comments

Difference between slippery slope and causal slippery slope

by Takashi March 16, 2019 at 15:34 1 comments

Are these deductive argument valid?

by xNegma March 10, 2019 at 21:18 3 comments

Is my argument that it is impossible for two things to share no similarities at all sound?

by Troodon Roar March 05, 2019 at 23:23 4 comments

Is 2 + 2 = 4 universally true?

by Crazy Diamond March 05, 2019 at 07:12 49 comments

Recommendations of logic text books

by andrewk March 01, 2019 at 23:01 5 comments

Do you think you can prove that 1+1=2?

by Nicholas Ferreira March 01, 2019 at 11:07 65 comments

Which form of argument is appropriate?

by Nicholas Ferreira February 25, 2019 at 09:18 9 comments

How to interpret this mathematical assignment

by Ulrik February 24, 2019 at 13:39 7 comments

Exercise from Bonevac's "Deduction"

by Jose Guilherme February 21, 2019 at 18:02 6 comments

Counterexemple to Hume's Law?

by Nicholas Ferreira February 17, 2019 at 02:29 12 comments

Infinity and zero

by TheMadFool February 04, 2019 at 04:55 2 comments

How to prove De Morgan's theorems with propositional logic?

by Nicholas Ferreira February 02, 2019 at 00:37 12 comments

Two questions on relations

by Philarete January 29, 2019 at 18:18 2 comments

Proving a mathematical theorem about even numbers

by Ulrik January 27, 2019 at 11:32 23 comments

Mathematics for philosophy?

by Hypnos January 25, 2019 at 06:39 4 comments

How does probability theory affect our ideas of determinism?

by Josh Alfred January 13, 2019 at 14:25 19 comments

All A is B and all A is C, therefore some B is C

by Nicholas Ferreira January 13, 2019 at 07:38 116 comments

What is the difference between petitio principii and a transcendental argument?

by Nicholas Ferreira January 07, 2019 at 05:16 6 comments

Another question about a syllogism

by Ulrik January 06, 2019 at 15:08 7 comments

Question about a basic syllogism

by Ulrik January 03, 2019 at 10:27 16 comments

Burned out by logic Intro book

by krishnamurti December 25, 2018 at 11:18 18 comments

Barcan Formula

by Shawn December 18, 2018 at 02:29 11 comments

Existential Quantification and Counterfactuals

by Shawn December 14, 2018 at 20:34 38 comments

The measure problem

by Fuzzball Baggins December 03, 2018 at 21:06 34 comments

A flaw in the doomsday hypothesis

by Fuzzball Baggins December 03, 2018 at 20:59 21 comments

Soundness

by Moliere November 27, 2018 at 22:05 23 comments

The problem of Negation

by Jerin Jaison November 27, 2018 at 16:53 9 comments

Need Urgent help in mathematical logic problem

by Zoro November 24, 2018 at 18:38 1 comments

Why Humans Will Never Understand 4D Space

by SteveKlinko November 22, 2018 at 21:04 53 comments