Doubt is corrosive.
Someone faced with doubt rarely brings her best self to the table. Doubt undermines confidence, it casts aspersions, it assumes untruths.
Yes, of course you need to qualify your leads. And yes, we know that you need to protect against risk and to not waste your time.
But… if you're going to spend five minutes or five hours with someone, what happens if you begin with, "the benefit of confidence" instead? What if you begin by believing, by seeking to understand, by rooting for the other person to share their best stories, their vision and their hopes?
Perhaps you can manipulate someone by scowling, by negging, by putting on airs. But if you do that, you end up with people who have been manipulated, who are wounded and not ready to soar.
The problem with qualifying leads is that all the obvious ones are already taken.
The challenge with assuming that someone is completely imperfect is that you'll almost certainly be right.
There's plenty of room for doubt later, isn't there?