I suggest you run with this one. Nicotine makes you smarter. Sure. Meanwhile all the other studies are junk. But this one, yeah, it's the real thing. Run with it.
Well, as a stimulant, it could. The question is do you want someone hooked on this stuff for the sake of the high.
What “other studies” are you referring to? Having researched this issue for years, I recall many studies that showed similar results, but I don’t recall any showing the opposite. What is so hard to grasp that a naturally occurring vegetable product may have a positive transitory effect on displayed intelligence?