I only recently joined this community, however it strikes me how many questions appear to be mostly about words. Often, the person who's asking seems to do so in an unclear formulation. I sometimes tried to get down to the definitions or not answer directly, but in a way that might explain the question a little better without actually giving the solution. How do you work with such questions?
Oversampling in OFDM (note the topic line)
Checking if u[n] and v[n] are orthogonal (Here, the poster appears to be asking for a definition, but the Text is cluttered and the Question is not very clear)