That is quite amazing, because I also smoke a lot of weed and have never experienced this phenominon that people claim of weed giving you “stupid thoughts”.
Researchers Find Minimal Long-Term Effects of Marijuana Use
An analysis of research studies with long-term, recreational users of marijuana has failed to reveal a substantial, systematic effect on the neurocognitive functioning of users. According to researchers at the University of California, San Diego (UCSD) School of Medicine, the only deleterious side effect found was a minimal malfunction in the domains of learning and forgetting.
Contrary to the popular opinion- if you are acting stupid, it is because you are stupid, not because weed is making you act that way…
Sorry I took a while to respond to this. No, pound mass is fairly common. The Earth exerts one pound force on one pound mass at sea level. Thus, you need a 32.2… conversion factor when you do convert from mass to force (at sea level). Slugs are defined such that one pound force is 1/32.2 slugs at sea level, thus ounds force are slugs*ft/s^2.
As I had said, this all arises from people coming up with a unit for force before they understood gravity well enough. As far as a cite, I would reference my time Aerospace Engineering Doctorate, but this should work too. You get confused by what people mean enough times and you start always writing lbm and lbf instead of lb.