[hyperthesis]

implicitness examples: precedence, type coersion, overflow, polymorphism.

But I suppose (e.g.) precedence doesn't arise that often; it "should" be familiar from high-school algebra; it can be made explicit (with parentheses or successive assignments).

[hyperthesis]

"Explicit" would seem to be "obvious" - is that necessarily true? Too much code can obscure what is happening.

Familiarity helps implicitness be understood. Some would argue lack of familiarity is the only problem with the languages you mention. Certainly, it helps: as you become more expert in anything, you start using short-hand and jargon, and skipping details.

Adoption is easier when it's similar to the familiar. Hence, "c-like". And python, psuedo-code-like.

But are some things easier to grasp, by nature? I think, "intuitive" often means familiar. And there are things that all human beings are familiar with, like space, trade and language. Perhaps this is where intrinsically obvious and familiarity coincide?