This from the BBC website Lost wallet found 5 years on
It is about a story in which somebody lost his wallet 5 years ago after he watched a game in a rugby stadium, and it was found 5 years later. Here is a sentence from the text:
....Mr Joiner said: "I never thought it could have been in the stand because of the number of people you would have thought would have sat here."
The part of the sentence "...you would have thought would have sat here." drew my attention. We don't see that structure very often. So, I wondered why it might have been used.
Why is it "...you would have thought would have sat..." but not "...you would think would have sat..."?
I did some research and found similar discussions, but they are not clear enough for me, as a non-native speaker.
So, I want to ask: Is it simply because the editor of the text assumes "the activity of thinking" already took place and cannot happen any longer?