Question: Do some psychotherapy patients have no mental illness?, Answer:Yes, Description of Psychotherapy: clinically applied psychology for desired behavior modification, Fact1: Psychotherapy is useful for couples navigating relationship issues., Fact2: Grief is a common reason that people seek psychotherapy. 
Step1: What are some common issues that make people seek psychotherapy?, Step2: Does #1 not always involve mental illness?, Wikipedia page for step 1: Psychotherapy, Wikipedia page for step 2: , not_definitive_answer: False, incorrect_answer: False