This is something that is desperately needed. More often than not I try to assess bold claims like "Blockchains will solve X". I try to follow the thought process of these claims and arrive at the solution: "Blockchains will most likely NOT solve X". The first comment to that is usually: "It was never supposed to solve X it is rather about Y which is loosely related to X".
There is no way to have a proper debate if one side if flip flopping about claims.