When the site was proposed the name Proof Assistants
was given (ref). However in the unofficial chat room, Area 51 meta questions and other places it became clear that others wanted the site to be about more than just proof assistants (ref).
One word that encompasses more of what others seek yet still tracks with the needs is Computational Logic.
I am still seeking a word or phrase that is includes more but this works for me at present.
For those wondering if a SE site can change its name and URL once it has entered beta, Yes. (ref 1) (ref 2)
Should questions arising from computational logic be asked?