I get how a reality works. That's not what I'm saying. I'm saying that in D&D, the rule is as long as you have noticed a threat, you cannot be surprised. Everything alive or undead is a threat, even plants. As it is written, you could not be sucker punched in 5e, which due to the afore mentioned reality, seems hokey. Except that a lot of D&D goes against reality, so you telling me that "It's plain, colloquial, language." doesn't change anything in how it is written, or what it might really mean.
It's very clear, Max. It just isn't written in technical language. That's a good thing.
Firstly, it does match reality, because people just aren't walking around afraid of plants, and even if they were, that doesn't mean that they're aware that a specific plant is a threat, any more than I'd be aware that a guy walking past me is a threat, just because I've been attacked completely at random by a guy walking past me on the street before. He can still sucker punch me, because knowing that people are potentially
dangerous doesn't mean I'm away that a specific
person is about to attack me.
It doesn't say that you have to be unaware that a potential threat might exist, it says you have to be unaware of the threat. A person isn't a threat just because they have the potential to attack you. You have to be aware that they're about to do so. There is no reason to make that any more clear than it is, wasting page space that is put to good use in the book as is.
I called it a non-rule rule, so clearly I said it was a rule. I said it was a non-rule rule, because it quite literally could have been not written without change to how things are done. They really should have just taken that out and saved the page space for something useful.
Meaningless quibbling about wording aside,
Someone else already explained that you're wrong about what the rules actually do without the clause in question.
It's a rule. Not a "non-rule rule", but simply a rule.
A system that is very spelled out doesn't have all the holes and ambiguity that 5e has. You can't escape a few, but 5e has tons.
Arbitrary to the point of the nonsensical. I could say that about any system that has more an alternative available with more spelled out rules. I could just as easily, using precisely the same reasoning, say that no game but GURPS has very spelled out rules.
Let's take a bit of the second page of the combat section.
Other activities on your turn.
"You can communicate however you are able, through brief utterances and gestures, as you take your turn."
This one contradicts itself within the same sentence. You can communicate however you are able, except only with brief utterances and gestures, not however you are able. What is a brief utterance, anyway? One word? Two words? Five words? A sentence? The whole 6 seconds? Clearly not the entire 6 seconds, because you can say a whole lot in 6 seconds, which wouldn't be a "brief utterance." Except why not the entire 6 seconds? That's the length of you turn and unless you are casting a spell, it seems like you should be able to talk that long.
There isn't a contradiction there, you're just questing after confusion.
Reactions. Entire threads have been devoted to trying to pin that one down.
Most of which have resulted from people refusing to read the rules, or trying to twist wording to mean something obviously not intended. A thing that is well known a cost of very spelled out rules systems.