About the topic in general. Because there are TV cameras with instant replay available, often from 3-4 angles, and the audience will know- usually immediately - whether a call is correct, it seems almost ludicrous NOT to allow proper results when there is doubt. Not on every trivial bit of action, but as mentioned, the coach should have the ability to question those events which might seriously affect the score...especially in Soccer/football where so few goals are scored.

The referees will still have plenty to do.....