There is no such thing as a heuristic, there are only things which function as a heuristic for some particular end or ends. Saying something is in a heuristic context is not saying much more than it might be useful for something in relation to something else --and you can say that about almost anything.
-> Heuristic 151, 156;
& Alternatives 2; Certainty 85; Heuristic 155;
156 | 157 | 158