Yes, thank you, o' pretentious one! I [i]do[/i] know the definitions of "valid". However, an opinion can be factually incorrect. That does not make it an invalid opinion. Validity of an opinion is not based on factuality; It's based on the subjective interpretation of the one receiving the opinion. By the way, if you didn't cherry pick your definition, you would see that "validity" has context [i]far beyond[/i] your cherry picked definition.