Give the rationale and then the answer. Yes / no, is the following a verifiable fact?
"The standard version of Sudoku uses a 15 by 15 grid."

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The game uses a 9 by 9 grid. The final answer: no.