When writing, for example, “The answer to this question has to be ‘yes’.” However, quotes are used for the first part of the sentence, thus making “yes” surrounded by double quotes (if correct.) ...
I've seen and used a usage of quote marks that I'm not sure is correct. If it is correct, I'd like to know what it is called. If it is incorrect, I'd like to know how to punctuate it correctly. Here ...