Given the sentence "One guy playing his instrument." is it true that "One guy is playing a guitar."? A step-by-step solution is:

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
Just because the guy play a instrument doesn't mean he playing a guitar.
The final answer: it is not possible to tell.