Given the sentence "An older man is trying to figure out what a sewing machine is." is it true that "The gentleman wants to learn how to use a sewing machine."?
Let's think step by step.
it is not possible to tell
Not every older man is a gentleman.

Just because the man is trying to figure out what a sewing machine is does not mean that he wants to learn how to use it.

.

Therefore, the answer is it is not possible to tell