Philosophical, mathematical and computational logic, linguistics, formal argument, game theory, fallacies, paradoxes, puzzles and other related issues.
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Fallacies

- 5 Topics
- 26 Posts
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Last post by David Henry7
November 26th, 2014, 5:25 am
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Logical Fallacy Game
by cloudy-a » August 14th, 2007, 7:37 pm
- 85 Comments
- 87700 Views
- Last post by mitchellmckain
September 15th, 2017, 12:47 pm
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Formal Philosophy Tutorial
by xcthulhu » February 24th, 2009, 11:09 am
- 5 Comments
- 13030 Views
- Last post by wolfhnd
May 28th, 2017, 2:01 pm
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Ascii and Logic
by cougar » February 15th, 2008, 11:53 pm
- 5 Comments
- 11774 Views
- Last post by Temporocitor
February 7th, 2012, 1:05 pm
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My Understanding Of Three Puzzling Paradoxes
by Keep_Relentless » December 21st, 2020, 11:30 pm
- 20 Comments
- 1030 Views
- Last post by Keep_Relentless
December 28th, 2020, 10:29 am
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The Logical use of ANY
by BadgerJelly » October 13th, 2020, 11:40 pm
- 9 Comments
- 1682 Views
- Last post by Serpent
October 14th, 2020, 3:26 pm
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A mistake the book?
by BadgerJelly » March 8th, 2018, 1:47 am
- 18 Comments
- 17580 Views
- Last post by edy420
November 15th, 2019, 8:21 pm
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Mathematics; discovered or invented?
by Benzie » February 27th, 2012, 10:17 am
- 32 Comments
- 26316 Views
- Last post by hyksos
October 22nd, 2018, 11:01 pm
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The Ten Commandments of Logic
by hyksos » July 4th, 2018, 7:12 am
- 1 Comments
- 2653 Views
- Last post by -1-
October 21st, 2018, 6:19 am
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Mirror Theory-Multidimensional Reflective Arithmetic / Logic
by Eodnhoj7 » March 5th, 2018, 1:34 pm
- 3 Comments
- 4587 Views
- Last post by Eodnhoj7
June 20th, 2018, 2:33 pm
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Lines and Numbers are Inseperable as Relativistic Unit-Parti
by Eodnhoj7 » March 2nd, 2018, 2:46 pm
- 4 Comments
- 6177 Views
- Last post by Eodnhoj7
June 11th, 2018, 1:13 pm
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The Paradox of Point Division and a Theoretical 1d Point?
by Eodnhoj7 » March 3rd, 2018, 12:53 pm
- 1 Comments
- 2998 Views
- Last post by Eodnhoj7
June 11th, 2018, 11:36 am
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"1" as Causal In Nature?
by Eodnhoj7 » March 13th, 2018, 12:55 pm
- 7 Comments
- 5935 Views
- Last post by Eodnhoj7
April 10th, 2018, 11:30 am
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The life of 3.1416
by Event Horizon » March 20th, 2018, 1:14 am
- 2 Comments
- 2971 Views
- Last post by TheVat
March 20th, 2018, 11:54 am
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Algorithms and logic
by A_Seagull » February 14th, 2018, 5:14 pm
- 8 Comments
- 6325 Views
- Last post by someguy1
February 20th, 2018, 3:22 am
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Insane "Logic"
by BadgerJelly » January 4th, 2018, 11:15 pm
- 6 Comments
- 4836 Views
- Last post by A_Seagull
February 15th, 2018, 3:59 pm
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Disjunction confusion!?
by BadgerJelly » September 29th, 2017, 4:09 am
- 17 Comments
- 10080 Views
- Last post by BadgerJelly
October 5th, 2017, 11:34 pm
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Simple Problem (need help with notation)
by BadgerJelly » September 20th, 2017, 12:12 am
- 10 Comments
- 7950 Views
- Last post by mitchellmckain
October 3rd, 2017, 4:19 am
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Logical Proof
by BadgerJelly » September 25th, 2017, 4:01 am
- 6 Comments
- 4783 Views
- Last post by someguy1
October 1st, 2017, 4:46 pm
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Propositional Logic (Part 2)
by BadgerJelly » September 2nd, 2017, 12:57 am
- 39 Comments
- 26609 Views
- Last post by mitchellmckain
September 19th, 2017, 7:11 pm
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Why this Mystery Spot Illusion?
by DragonFly » September 15th, 2017, 7:38 pm
- 4 Comments
- 3482 Views
- Last post by rajnz00
September 17th, 2017, 2:21 am
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Propostional Logic : Truth Assignments
by BadgerJelly » August 31st, 2017, 3:41 am
- 12 Comments
- 8902 Views
- Last post by BadgerJelly
September 1st, 2017, 10:37 am
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How to read a question?
by BadgerJelly » August 15th, 2017, 5:32 am
- 11 Comments
- 7178 Views
- Last post by Serpent
August 20th, 2017, 4:47 pm
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Does this refer to a particular kind of Modal Logic
by BadgerJelly » August 19th, 2017, 10:14 am
- 6 Comments
- 4717 Views
- Last post by Sivad
August 19th, 2017, 12:35 pm
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Refutation of the proposition of "Object"
by BadgerJelly » August 1st, 2017, 5:20 am
- 9 Comments
- 5764 Views
- Last post by BadgerJelly
August 2nd, 2017, 9:51 pm
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Is logic essential to philosophy?
by A_Seagull » July 17th, 2017, 11:23 pm
- 10 Comments
- 7598 Views
- Last post by BadgerJelly
July 19th, 2017, 1:47 am
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The world's hardest logic puzzle!
by Percarus » October 23rd, 2012, 6:49 am
- 25 Comments
- 27795 Views
- Last post by RexAO
July 18th, 2017, 12:49 pm
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You Don't Know Jack
by NoShips » June 22nd, 2017, 10:20 am
- 50 Comments
- 27653 Views
- Last post by NoShips
June 25th, 2017, 11:43 am
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How many 'truths' are there?...
by Scott Mayers » November 11th, 2016, 2:26 am
- 79 Comments
- 49268 Views
- Last post by wolfhnd
June 7th, 2017, 11:53 pm
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ODD BALL LOGIC PROBLEM
by Alan McDougall » March 26th, 2016, 10:46 am
- 20 Comments
- 15875 Views
- Last post by TheVat
May 29th, 2017, 6:51 pm
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what is this fallacy?
by hyksos » October 22nd, 2016, 11:54 pm
- 4 Comments
- 4842 Views
- Last post by Scott Mayers
January 18th, 2017, 4:01 am
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What type of logic is this?
by NaN » January 6th, 2017, 9:24 am
- 2 Comments
- 2917 Views
- Last post by Athena
January 7th, 2017, 6:02 pm
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implications
by chris12 » February 3rd, 2016, 10:46 am
- 4 Comments
- 4480 Views
- Last post by Scott Mayers
November 8th, 2016, 3:20 pm
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Can Universe be described as a set?
by in_vaccum » September 10th, 2016, 10:54 pm
- 6 Comments
- 5322 Views
- Last post by in_vaccum
September 12th, 2016, 12:07 am
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AxFx -> ExFx, in the empty domain
by Owen » August 10th, 2016, 5:32 pm
- 5 Comments
- 5669 Views
- Last post by someguy1
August 15th, 2016, 5:00 pm
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Do corrupt people always suffer.
by manishsqrt » July 13th, 2015, 9:53 pm
- 4 Comments
- 4846 Views
- Last post by vivian maxine
July 23rd, 2016, 7:02 am
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Self-referentiality (cf. Gödel) and logic
by ontological_realist » April 16th, 2016, 7:20 pm
- 0 Comments
- 2504 Views
- Last post by ontological_realist
April 16th, 2016, 7:20 pm
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Common Sense. Does it exist?
by xme » May 10th, 2010, 1:16 pm
- 26 Comments
- 30618 Views
- Last post by pency
April 16th, 2016, 1:20 am
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implicatios 2
by chris12 » February 7th, 2016, 12:25 pm
- 1 Comments
- 2718 Views
- Last post by Jägerbombastic
March 7th, 2016, 3:32 pm
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Dangers of different things
by caters » January 18th, 2016, 6:22 pm
- 3 Comments
- 3826 Views
- Last post by TheVat
January 19th, 2016, 12:24 am
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You cannot step into the same river twice
by HomunculusThor » June 30th, 2015, 11:16 pm
- 6 Comments
- 7107 Views
- Last post by Don Juan
December 9th, 2015, 12:49 pm
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Pythagoras should get more credit than he does
by Phaedras » July 7th, 2015, 12:30 am
- 1 Comments
- 2714 Views
- Last post by Marshall
July 7th, 2015, 2:37 am
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rational to believe x and y?
by evaristegalois » February 13th, 2015, 2:24 pm
- 22 Comments
- 17624 Views
- Last post by vivian maxine
April 18th, 2015, 11:14 am
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Golden ratio in natural binary.
by JamesLogan » April 9th, 2014, 6:22 pm
- 1 Comments
- 3621 Views
- Last post by DigitalReality
April 16th, 2015, 10:45 am
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Excluded Middle
by owleye » November 23rd, 2014, 3:36 pm
- 24 Comments
- 18192 Views
- Last post by Don Juan
December 2nd, 2014, 10:01 am
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Does "illogical" exist?
by skakos » November 20th, 2012, 4:23 pm
- 60 Comments
- 35281 Views
- Last post by skakos
August 30th, 2014, 11:43 am
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The logic of "Cogito ergo sum"
by avanover » August 6th, 2010, 2:14 am
- 34 Comments
- 32883 Views
- Last post by doogles
May 13th, 2014, 12:00 am
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An Appeal to Ignorance?
by mtbturtle » April 23rd, 2014, 4:34 pm
- 4 Comments
- 4843 Views
- Last post by neuro
April 24th, 2014, 3:26 pm
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Boolean vs Aristotelian Venn Diagrams
by JessicaMe » April 18th, 2014, 12:47 am
- 0 Comments
- 4415 Views
- Last post by JessicaMe
April 18th, 2014, 12:47 am
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well formed formulas
by chris12 » April 5th, 2014, 10:59 am
- 5 Comments
- 4709 Views
- Last post by Natural ChemE
April 6th, 2014, 4:18 pm
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Begging the question or Appeal to Authority?
by laurenbehr2014 » March 3rd, 2014, 12:36 pm
- 27 Comments
- 24960 Views
- Last post by mtbturtle
April 4th, 2014, 1:39 pm
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