What does Ango Sakaguchi's ability "Discourse on Decadence" do? In Bungou Stray Dogs, Ango Sakaguchi's ability is "Discourse on Decadence".

I googled and looked at the wikis, but there's no information about it.

What does it do?
Spoilers for the manga.

It was revealed in the manga that Ango's ability is to read memories that are left in things, basically a memory extraction ability.