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.

Is the following a factual statement?
"A great team building game kids play in school is Dodgeball."
Options:
- yes
- no

Let me think out loud. While it is a relatively high intensity team game usually played by adolescents in grade school, it has been found to encourage team building and cooperation. The answer is yes.

"David Gilmour left Pink Floyd in 1970."
Is the above claim true?
Options:
- yes
- no
Let me think out loud. David Gilmour is still in the band to this day. The answer is no.