their unique gram these are two different things they're they're opposites in this in this fashion so here you say hey some words appear way way way more often than other words shouldn't we prefer them when we sample right shouldn't we if we have a corpus and shouldn't we sample from the corpus and if in the corpus one word appears 50 times more than the other word then shouldn't we sample that 50 times more as a negative because it's you know so abundant and it should read get a higher classification accuracy