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.
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.