Hmmm... I'm not sure if cannabis will work that fast in terms of destroying brain cells, considering that you've only been smoking for 2 years. As far as I know, cigarettes and alcohol kill brain cells faster. So if you really feel like you're losing your edge in terms of memory retention, I suggest getting some supplements or milk with memory enhancers. My gramps drinks it and at 94 years old, he can still remember my name lol.