[fingerlocks]

They aren't supposed to be used simultaneously, which is literally what my comment was explaining. Different guidelines to solve different problems.

[zephen]

Have one source of truth is a universal guideline.

Prefer structs over classes is a universal, if weak, guideline.

It's funny how people can be all hung up on composability of things like type systems, and then completely blow off the desire for composability of guidelines.