That would depend on whether I wanted to provide the person who asked with accurate info on the state of precipitation in a way which they would understand correctly, given the wording of their question, or whether I wanted to answer based on the logic of the wording.
"Is it <whatever>". If <whatever> is false, the answer is "no". If true, "yes".
So if <whatever> is "not raining", and it is not raining, <whatever> is true, so the answer to "Is it not raining?" is "Yes".
Shall we go out?
Is it not raining?
No, (it is not) OR Yes, (it is).
Shall we go out?
Isn't it raining?
No, (it isn't) OR Yes, (it is).
They are both the same.
I don't think either means "Is it" - "not raining" to, technically, elicit the answer "Yes" if not raining but
"Is it not" "raining" which elicits the answer "No" if not raining or "Yes" if raining.
I think (maybe wrongly) Bas' "However" means he thinks the answer could be the opposite.
What about "You are Simon Abbot, are you not (aren't you)?" - Are you not (aren't you) SA?"
It may just be a quirk of the language to which we have become accustomed.
Another way is "You're not Simon Abbot, are you?"
Isn't the answer in all cases dependent on whether you are or are not SA; and not the wording?
A good one is "Don't you forget(?)" which can be an instruction or a question.
When used as an instruction - "Meet me at six; don't you forget" - can it be worded differently?
Because you may not agree with something that happened before you were born does not mean it has not happened. You have to recognise it.
You are in the island of Ireland, but you are not, as far as we can tell, in the Irish Republic. As such your displaying the Irish flag as your country is a lie. Really it is time you grew up.
Ignoring the fact that in reality there is a cline, it is either raining, or it is not. The not applies to the raining.
You can ask "is it raining?", or "is it not raining?"
"Is it [status]?"
The "not" is irrelevant to the way the logic works. "Is it Wednesday?" - If it is Wednesday, the answer is yes.
"Is it raining?" If it is raining, the answer is yes.
If it is not raining, the answer is no.
Is the value of the proposition "it is raining" true, or false? If true, i.e. it is raining, the answer is yes. If false, i.e. it is not raining, the answer is no.
But if you invert the value of the condition being tested for, but not the condition itself, then the answers must invert.
Is the value of the proposition "it is not raining" true, or false? If true, i.e. it is not raining, the answer to the question "is it not raining" is yes. If false, i.e. it is raining, the answer is no.
I don't think either means "Is it" - "not raining" to, technically, elicit the answer "Yes" if not raining but
"Is it not" "raining" which elicits the answer "No" if not raining or "Yes" if raining.
The "however" is in recognition of the fact that people don't mean what they are asking, and will take an answer to mean the opposite, and then there could be strife.
There would particularly be strife if the question was about a future event.
"I really need to take the car for a service - could you get the bus to your Mum's?"
"Oh - is it not going to pour with rain?"
"No."
i.e. the proposition "it is not going to pour with rain" is false, i.e. it is going to pour with rain.
When the bus traveller returns soaked to the skin they will not agree that you should have answered as you did.
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