Note that set-nominated FPs would sometimes fail to show thumbnails - please don't remove them but choose one of the set photos (maybe the first and/or the best one) to show in the gallery herewith an additional description like " - a set…
In this thesis I argue that this is because proof assistants don't emphasise explanations of proofs; and that in order to produce good explanations, the system must create proofs in a manner that mimics how humans would create proofs.