But it was a hard thing to prove. You have to look at the six color and disqualify any possibility of a stronger suit in a single color. It was a chore to prove, and I don't think I could, so we went on.
Occasionally it takes a bit of analysis to prove a claim, but it never seemed tedious or hard to us. There are not that many possible ways an incomplete side could be completed to counter the claim.
(Maybe it's one of those things you get better/faster at doing with practice.)