[hagreet]

When I shuffle a deck of cards and put it down on the table the top card doesn't change anymore. Yet anybody will consider the first card to be random.

In practice randomness is about lack of knowledge not about actual randomness or processes.

(Edit: Sorry, but this clickbait title redefining randomness as something other than what everybody understands it to be annoyed me.)

[Chris2048]

I'd argue probability is about that (given information at a time), i.e. everything has probability 1 or 0 given perfect information (and computation/inference) about a deterministic universe, but some other number (by a metric) given partial information (and perfect computation/inference).

Randomness is perhaps a description of correlation? Which obviously relates to probability, prediction of uncertain outcomes, but maybe more general?..