How can a person know if a traumatic memory is false or real?

Confirmation: There are "therapists" who will try to evoke these memories and then tell you they are real and that remembering them will heal you. This is not evidence-based and is rejected by most scientific practitioners; it has caused terrible problems for families. If you had the memory with your others before treatment, you remember details & it makes sense, it's probably real. But look forward, not back.