Teenagers · Critical Thinking & Logic
Arguments that look perfectly logical… but hide a secret mistake. Can you catch the trick before it catches you?
Studied for over 2,000 years. A sophism teaches you how to think clearly, spot manipulation, and never lose an argument to someone who is simply, loudly, wrong.
Read each argument aloud. Let the group decide: is it true? Where's the trick? Then reveal the flaw.
Read · Guess the flaw · Reveal
The first sentence only works for things you had in the first place. You never had horns, so there was nothing to lose. The argument quietly assumes what it's trying to prove.
Since a = b, then a − b = 0. The step "divide both sides by (a − b)" secretly divides by zero, which is forbidden. Everything after it collapses.
Waking up early doesn't create success. Success depends on work, knowledge, discipline, opportunity and persistence. The argument confuses a habit some successful people share with the cause of their success.
Having four legs is shared by many animals, so it can't define "cat". The argument takes one common feature and treats it as if it were the whole identity.
Not seeing something doesn't prove it's not real. You can't see radio waves, gravity, or your own thoughts, yet they exist. A lack of evidence is not evidence of absence.
Instead of discussing the idea, B attacks the person. Even if A were jealous, the idea could still be bad. Attacking character dodges the actual argument.
These aren't tricks to "solve". They are genuine cracks in logic that philosophers still argue about. Let students sit in the discomfort.
A paradox of vague words. "Heap", "tall", "rich", "old" have no precise boundary. Each small step seems fine, yet they add up to something impossible. Great for debating where any blurry line really sits.
If he returns the baby, her prediction was wrong, so he shouldn't have. If he keeps it, her prediction was right, so he must return it. No action keeps his promise. The logic eats itself.
One of the oldest puzzles in philosophy. A sentence that talks about its own truth can break the rules of true/false entirely. It shows that language can build sentences logic cannot handle.
Make an argument that sounds true but hides a mistake. The group has to name the flaw.
The trap: the first premise is simply false. Not all birds can fly. Now build a sneakier one of your own.
Vote, then defend it carefully. No fallacies allowed.
Being intelligent is not only about knowing facts. It is about asking: "Does this argument really make sense?"
That is why studying sophisms is so useful: in exams, in arguments, and in everyday life.