YOU are missing the point.
The question isn't whether you should trust your eyes or not. The question is whether you should trust your recollection of what your eyes saw or not.
cp writes:
it doesn't seem like a good way to exist.
Welcome to the real world, where you sometimes have to admit that you were wrong. This is a trait that, I think, you seem to lack.
I know for a fact that I have suffered from false memory syndrome before. I also know for a fact that there are many people I know who have suffered from false memory syndrome.
Unfortunately, I do know some people that still think their memory is a tape recorder.