Given the sentence "A man with glasses and gray hair is reading a card in front of two tuba players." is it true that "An old man is reading a birthday card."?
Step-by-step reasoning:
it is not possible to tell
Not all men are old.

The fact that a man with glasses and gray hair is reading a card in front of two tuba players doesn't imply that he is reading a birthday card.

.

The answer: it is not possible to tell