If Joe introduces himself as Dr. Early to sell to Gensol, knowing that people will assume that he was a medical doctor, but he never tells anyone that he is, would contracts entered into be considered fraudulent?

Probably not, because there is no statement of a material fact since he did not say he was a medical doctor.

Explanation:

If Joe introduces himself as Dr. Early to sell to Gensol, knowing that people will assume that he was a medical doctor, but he never tells anyone that he is, would probably not contracts entered into be considered fraudulent because there is no statement of a material fact since he did not say he was a medical doctor. Joe's act certainly will not be considered as illegal and fraudulent because of having no statement of fact.