Originally Posted by origmarm
The approach to this for me is always very clear. Call every line as accurately as you can. If there is any doubt in your mind, the ball was in. Simple as that really. If you feel your opponent is being dishonest say so. If you feel that they are calling in good faith there is no problem.
+1. If there is a doubt, it is in... unless...
... your opponent has been displaying abhorrent gamesmanship and robbing you of obvious calls. In those cases, if there is a doubt... I call it out.