Yeah, I know memory fades with age. Doesn't mean I don't want to hold them as long as possible
You won't be able to form short term memories while stoned as well as you do when sober. The effect can be more noticeable if you get high a lot. Stop getting high and the effect will disappear allowing you to form short term memories normally again, but the memories you did not form while high will still be missing. It's also hard to recall things sometimes when you are high but that goes away when you sober up as well. The cannabinoids interfere with the process of storing the memory in the first place. IMO it's the only honest bad mark against cannabis. I choose to live with it because it's not that bad (with directed effort I can overcome it mostly) and my knees are very much that bad.
Cannabis use has absolutely nothing to do with long term memory, it only effects short term memory and only while under the influence. Cannabis has actually been scientifically proven to preserve brain cells.
It is far more likely that she doesn't remember her younger years due to age. Or she was stoned all the time. Cannabis doesn't take memories away. It only affects the ability to form the short term memories in the first place. She might have trouble remembering things because she is high now, but when she is sober the effect is gone. If she doesn't remember things from her youth, it is due to not forming the memory then, or due to losing the memory to a non-cannabis cause.
