Some Puzzles About Truth. (and belief, knowledge, opinion, and lying). Puzzle #1: the postcard paradox. Consider the following sentences: 1) the following sentence is true: 2) the preceding sentence is false. (examine the index card now circulating) Q: are these sentences true or false?.
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(and belief, knowledge, opinion, and lying)
1) the following sentence is true:
2) the preceding sentence is false.
This proposition is false