https://en.wikipedia.org/wiki/Uncodified_constitution
https://en.wikipedia.org/wiki/Convention_(political_norm)#Un...
Note the second one applies to the US - a country with a mostly but not completely codified constitution.
I don't think this is helping much in the US right now. The orangefuhrer has shown he is willing to ignore clauses that are inconvenient.
It's a shame you can't really explain it. It's ineffable, isn't it.
"I do too, but the way Trump is behaving, pretty soon it will be illegal to ..."