Disconfirming evidence need not come in a "no, but" stance.

It can also come in a "I wonder..." or "How might we..." form, that allows a "yes, and" engagement.

Not all disconfirming evidence is created equal.

You should share disconfirming evidence into the group, but not force the group to take it--perhaps you're calibrated wrong and it's not useful!

When you share disconfirming evidence in a "no, but" modality, the group is predisposed to meet it in a defensive crouch.

It feels like getting a shove, or even a punch in the face.

The only option is to crouch defensively.

There's a very real chance the group will knee-jerk reject something that could have actually improved the idea.

But if the group knows they have the option to absorb the evidence or ignore it, they don't put up their defenses, and are more willing to engage with it, perhaps learning something!