How would you, for yourself, verify past lives and the interpretation of past life experiences.

However, yes, one cannot really "know" without their own experience that brings them to "knowing." This is why a lot of information that we operate off of is intersubjectively verified, and why we appeal to a certain scope of apparent similarity with respect to "common" experience.

Yes, we can't mistake the picture for what is pictured. We can't mistake the words for that which they are symbols for.

However, there's some equivocation here. This "phenonemon" we call a "past life experience" is given a specific interpretation by the title alone; past life. It can mean a past life that the person experiencing it lived in the past. It could also just be the viewing of someone's life in the past. It could also just be something made up by our brains and/or minds. But what many people do is run with it as though it is the case that they themselves lived x past life.

You think that everyone has this kind of experience?

The tag here is past lives. What is the hook? And what is the wall? And what is behind the wall.