Forum:Solemn Judgment

Can someone make this like an official rule, cuz i have a lot of problem with this kind of thing that applies to other monster effect too, i belive. Cuz there is not such a valid reference for solemn effect, like when someone negates the summon of destny end dragoon with it own effect i told them, that they can't but i don't have a way to prove it. So how can or where can i show a reference about this??