It's a passive part of my active thought process. Sometimes it results from something I'm doing in the moment while stoned (i.e. listening to a conversation), other times it is just me pondering something that happened to me previously. My brain identifies new potential reasons and motivations for what I'm witnessing or thinking about. Most of the time i can dismiss an observation because logically it doesn't matter or make sense... Presumably that's what my subconscious is doing behind the scenes when I'm sober, filtering out the illogical. But every once in a while i consider something my subconscious would have ignored that seems logical. It's particularly helpful in understanding the motivations or assumptions of others. I think i am better at reading people and understanding their point of view because of it.