Sorta. If its response is grounded in actual material, and you're thorough, it's not so risky. As with all learning, trusting one source is a risk in itself. He

Sorta. If its response is grounded in actual material, and you're thorough, it's not so risky. As with all learning, trusting one source is a risk in itself. Hell, I didn't even trust my physics textbooks in college. Physics.