[clairity]

so is your argument that those off-the-cuff examples are not really rules because they're arbitrary or fuzzy (like every other rule, convention, or custom)?

the point is that there is no real world 'free market' that meets your idealized (and arbitrary) conditions.

[whatshisface]

Yeah, of course there's no real world free market. It's a theoretical idealization that we wouldn't even want to exist in reality.