What if someone says "no no" or "no dont". That conveys a negative response despite being two negatives. Granted these aren't proper English or full sentences, but it's something you might say
"No, don't [do that]" is not a double negative, it's just two independent negatives in a row, they don't affect each other. A double negative would be like "don't not do that" which will mean "do not fail to do that" to most people.
In english a double negative is a positive, and is syntactically incorrect.
What if someone says "no no" or "no dont". That conveys a negative response despite being two negatives. Granted these aren't proper English or full sentences, but it's something you might say
"No, don't [do that]" is not a double negative, it's just two independent negatives in a row, they don't affect each other. A double negative would be like "don't not do that" which will mean "do not fail to do that" to most people.