Even if we posit that for every pair of humans X,Y if X thinks thought T then Y is capable of thinking T, it doesn't follow that for all possible Ts, X and Y are capable of thinking T.
That is, whether Alice can think the thought in the first place is not clear.
If you limit yourself to humans, yes. But at least one mind has to be able to think a thought for that thought to exist.
Here's the new thread for posting quotes, with the usual rules: