>>40771564
>What you think "time" is, is just the way your brain processes your memory
Memories of what? Let's use the 70 year old with dementia example. The memories he's missing are things from... the past. That's what memories are.
It sounds like the issue isn't that time itself is unreliable, but rather that human memories are. Brains, or even a computer hard drive, can have memories erased or they can be damaged so they don't function properly.
If you're positing that there are multiple versions of the past, that's a much better statement to make than "time is an illusion." Those are clearly different ideas. I have personally traveled between different timelines, and even had things sort of "rewind," including my own death, but time still holds meaning within them. Some events still proceed others.