Can you guess the word if you are not 100% sure what was spoken?

A) Yes
B) No

Deduction means to use the given information and reach to a certain conclusion.

So, (A) Yes, the word can be guessed even if we are not 100% sure what was spoken.

In English, the words which are used to indicate this certainty, probability or deduction are modal verbs.

And when we are not 100% sure then we can use modal verbs such as-should, might, may or could.