Question... Just played a game in which I reached 20 on the Impossible (with all 3 leads confirmed) IN THE SAME MOVE that Sherlock reached 0 on his track. Who is the winner?!?!
Sorry but the moment you confirmed the 3rd lead, without the impossible being at 20, you lost.
Eliminating incorrect evidence and red herrings is what enables you to prove beyond reasonable doubt that the evidence is correct, and therefore confirm the final lead.