In preventing logo bridging, how many of the following statements are correct?

• A. ALL statements are correct
• B. ONLY ONE statement is correct
• C. TWO statements are correct
• D. THREE statements are correct

Answer: (C)

These statements create a self-referential puzzle about how many of them are true. To be consistent, you test each possible number of true statements and see if it matches what the statements themselves claim. If all four were true, that would force contradictory counts among the statements, so that can’t happen. If exactly one statement is true, the only one that can hold up is the one that says exactly one statement is correct. Then that single true statement is satisfied, and the other three, which claim different counts, are false. Trying two or three true statements leads to contradictions as well: the counts they assert wouldn’t match the actual number of true statements. Therefore, the consistent resolution is that exactly one statement is correct, namely the one that asserts only one statement is correct.