If you have mental issues, you cannot agree to the agreement.  It says so, right in it.  You have to state that you have no such issues. 

So, our mentally agrieved cannot avail themselves of the ultimate knowledge of knowledges, eh?  How "ultimate" is that?

M..... you are a wanker!  There is no other way to put it.  You are a useless piece of work..... no doubt about it!