The corner of the classroom is a corner. Is this statement correct? Why?

The question itself is not rigorous enough, so your question depends on the environment in which it is used. Literally, taking a rectangular classroom as an example, classroom corner and classroom corner are two completely different concepts. The classroom corner refers to four corners, and the classroom corner refers to one of the four corners. If these words are put in sentences, the corner of the classroom can also refer to a specific corner or corners. China culture is extensive and profound. If you want to take a sentence seriously, you must determine the time and place, the speaker and many other factors to make the meaning of the sentence clear.