What is the fallacy in this proof?
41418
$2+2 = 5$? error in proof
143248
What approach should I take to establish this logical proof?
144713
Simple Calculus Proof
158016
Help understanding predicate logic question/proof
88188
Explain proof by contradiction.
109858
How could a statement be true without proof?
46967
What is wrong with this proof that the power set of natural numbers is countable?
2251
Can someone give me a hint on how to prove this?
43700
Are proofs by contradiction really logical?
50804
It seems obvious, but how to prove it formally?
4182
What are some classic fallacious proofs?
23319
How to disprove this fallacy that derivatives of $x^2$ and $x+x+x+\dots\quad(x\text{ times})$ are not same.
118577
Fallacious proof involving trigonometry
48606
Help with a Predicate Logic homework proof
22193
Why, logically, is proof by contradiction valid?
29629
Distinguishing between valid and fallacious arguments (propositional calculus)
22584
Can we prove that a statement cannot be proved?