I don't think that's a serious barrier in this case. The above poster just would rather dismiss a statement rather than give it serious thought. It's easier to simply claim to know the one true meaning of "simple" rather than actually communicate effectively.
> what's more effective than having a pre-defined term be what it means, rather than what the speaker intends internally?
Trying to understand the speaker, presumably, and not wielding your pet definition like a semantic argument. It's fundamentally boring conversation with no benefit to either party and it makes you look like an illiterate ass.