Which kind is this?

Maybe there are only two kinds of question in the world. The kind they ask in school, where the answer is known in advance; asked not so that anyone will be any the wiser but for other reasons. And then the others, those in the laboratory. Where one does not know the answers, and often not even the question, before one has asked it.

Peter Hoeg: Borderliners

Time travel takes time.

I could work at a problem for years, but to wait inactive for twenty-four hours — that is another matter.

H.G. Wells: The Time Machine

A, H, J and P.

There a names which I trust blindly.

Expected type Target, found Foot.

Informally, though, safe languages can be defined as ones that make it impossible to shoot yourself in the foot while programming.

Benjamin C. Pierce: Types and Programming Languages

Imperfect Life.

Hey brother, I'd love to tell you I've been busy
But that would be a lie
Cos the truth is the years just pass like trains
I wave but they don't slow down

Steven Wilson: Happy Returns / Ascendant Here On...