Is the following a factual statement?
"Avril Lavigne disappeared after she was replaced by a look alike during her late career."
Options:
- yes
- no

Let me think out loud. The likelihood that Avril Lavigne was replaced by a body double of her is very very slim. The answer is no.

Does the following sentence make sense?
"An unborn child is only carried by the Mother and not the father."
Options:
- yes
- no

Let me think out loud. Biology dictates the terms here. Its virtually impossible for a male to give birth naturally. The answer is yes.

Yes / no, is the following a verifiable fact?
"The standard version of Sudoku uses a 15 by 15 grid."
Let me think out loud. The game uses a 9 by 9 grid. The answer is no.