I think there were two decisions today which highlight the ridiculousness of the review system, and a third that confirms it.
Khawaja's was a turkey. You could tell watching live that he was nowhere near the ball and nothing on the TV replays offered any convincing reason to believe that he was.
The England review against Smith was almost as bad - no hotspot (which makes you wonder whether something is being applied to bats), but a clear noise that could only have been bat on ball and a deviation. Should have been gone.
Then, having lost a review that they should have got, Smith is given not out to one of the plumbest LBWs but England couldn't review it!
Might as well do away with the system!