| boy or girl paradox(noun, expression, question, problem, puzzle) |
| bracketing paradox(noun, expression, question, problem, puzzle) |
| c-value enigma(noun, expression, question, problem, puzzle) |
| c value paradox(noun, expression, question, problem, puzzle) |
| calcium paradox(noun, expression, question, problem, puzzle) |
| calcium paradox phenomenon(noun, expression, question, problem, puzzle) |
| card paradox(noun, expression, question, problem, puzzle) |
| catch-twenty-two(noun, question, problem, puzzle, riddle) |
| chainstore paradox(noun, expression, question, problem, puzzle) |
| clock paradox(noun, expression, question, problem, puzzle) |
| coastline paradox(noun, expression, question, problem, puzzle) |
| code-talker paradox(noun, expression, question, problem, puzzle) |
| coin rotation paradox(noun, expression, question, problem, puzzle) |
| conundrum(noun, question, puzzle, riddle) |
| cool tropics paradox(noun, expression, question, problem, puzzle) |
| cosmological paradox(noun, expression, question, problem, puzzle) |
| cosmological paradoxes(noun, expression, question, problem, puzzle) |
| crocodile dilemma(noun, expression, question, problem, puzzle) |
| crystal paradox(noun, expression, question, problem, puzzle) |
| cuttered cat paradox(noun, expression, question, problem, puzzle) |