In reply to HeMa:
But he said 'the fundamental defining element of sport climbing is that it relies on bolts for protection', which I would agree with, not that bolts = a sport climb (if you assume an implicit 'only' before the word 'relies').
If a climb relies on both bolts and trad gear, it is not a sport route.
If a climb relies on both a limited number of bolts and skill during dangerously run-out sections, it is not a sport climb.
To be a (well-bolted) sport climb the bolting should be sufficient to completely protect the climber at all points.
Various exceptions prove the rule (e.g. badly-bolted sport routes).