"No apples are blue."
Translation:Żadne jabłka nie są niebieskie.
Here's a joke about an English lecturer who is teaching grammar to his students. Lecturer: 'In English, there is no such thing as a double negative, since two negatives always make a positive. Of course, it goes without saying that there's also no case of two positives making a negative.' Disinterested student, rolling their eyes: 'Yeah, right!'