Many forms of intelligence

So I watch the dr. Phil episode about dr. Phil discrediting marijuana and pointing that marijuana lowers IQ. I really wanted to just dig into this Terry because it's not about the marijuana it's about dr. Phil's ability to understand multiple forms of intelligence. We can't look at one form of intelligence we need to look at multiple forms of intelligence to improve our society. I do use the r-word but to point out that it's useless.