In the good old days there was a word ‘medium’ which had the plural ‘media’. Marshall McLuhan’s ‘The Medium is the Message’ is an example of that usage. We talked about the media, by which we meant TV, newspapers and magazines, music CDs and video. Then along came Facebook and Twitter which are more recent examples of media. So far so good – but now people say ‘ Social media is very influential’. Should we just shrug our shoulders and put it down to the evolution of the English language?
And have criteria gone the same way? In the grammatically correct past you talked about one criterion and two criteria. But, just like media, criteria seems to have become a singular noun e.g. the criteria for being accepted is very challenging.
Should I be worried?