Thread: как or что ?

Originally Posted by impulse

Thanks for the example but I still do not understand the difference between Что and Как.

"Как ты думаешь, <insert yes/no question here> ..." is used when you are asking about opinion (yes/no) on some topic ("Say, do you think I should call him?")

"Что ты думаешь о <insert topic here>" is what is says on the tin: the question about what.. a person.. thinks on the topic ("What are your thoughts on global warming?").