I agree with Biffo that you'd be not likely to confuse "No." Using the phrase "No" once you think about it. But I do from time to time encounter a split-2nd hesitation when reading a sentence with "No.", specifically if there is a space concerning it and the next variety: https://charliejtzgm.bloggazzo.com/35418251/the-greatest-guide-to-no-scrubs-tlc