you can not because most of the times these ICOs don't even write their own whitepaper. instead they pay someone with quite a lot of experience in the field to write something without even knowing what their project is about. they have experience in creating a good advertisement for that shitcoin.

also ICOs are always using a cool looking idea to fool you into thinking they are actually implementing that idea. and their paper is filled with that while in reality they don't do anything remotely close to that.