Statement: You know that your suit is excellent when people ask about your tailor who tailored the suit. Assumptions: 1 People do not ask about your tailor if your suit is not good. 2 The people want to know the criterion of an excellent suit.

The statement mentions that if the people ask about the tailor, your suit is good. This means that people ask only in the situation when the thing is good. So, I is implicit. The criteria of an excellent suit is not mentioned. So, II is not implicit.