To answer your original point
a cake without icing wouldn't lose the predicate; it would not be called a cake.
( Flapjack I spay a little mare for you, Tue 23 Jun 2009, 22:06, archived)

But that can't be right. We revise our meaning of words all the time to account for new experiences.
If I saw something that was exactly like a cake in all respects except that it wasn't iced, I'd remove 'is iced' from my list of cakey predicates, and from then on I'd mean something different when I said 'cake'.
( Comma, Tue 23 Jun 2009, 22:09, archived)

not really
if I saw a human body that had absolutely everything except a leg, I wouldn't call it a human. It's a cripple. A fucking one-legged spacker cripple cunt.
( Grrrmachine the indifference engine, Tue 23 Jun 2009, 22:11, archived)

Who else would?
No-one would have a clue what you were talking about. Until you popularised it, and then cake would not require icing.

Bachelor is an existing widely-used word for [man] + [is married]. The reason you don't talk about a married bachelor is because it's not useful communication.

Words are for communication, there's no logos behind them. They're only meaningful because they're useful; their meaning is their use.
( Flapjack I spay a little mare for you, Tue 23 Jun 2009, 22:19, archived)

On the flip side
some nouns have so many predicates that if you try to analyse them they all but disappear. "Game" is one. Yet people use them every day and know exactly what a game is.
( Flapjack I spay a little mare for you, Tue 23 Jun 2009, 22:24, archived)

i've to see icing on
a urinal cake
(rigby happened on (and with added toothache), Tue 23 Jun 2009, 23:02, archived)