Full Idea
To defend type-type identity against the multiple realisability objection, we might (also) say that while a frog's brain events for fear are functionally identical to a human's (it runs away), that doesn't mean they are phenomenally identical.
Clarification
'Phenomenally' refers to the qualia, the what's-it-like to experience something
Gist of Idea
Maybe a frog's brain events for fear are functionally like ours, but not phenomenally
Source
PG (Db (ideas) [2031])
A Reaction
I take this to be the key reply to the multiple realisability problem. If a frog flees from a loud noise, it is 'frightened' in a functional sense, but that still leaves the question 'What's it like to be a frightened frog?', which may differ from humans.