Rethink Perfect is the call of a challenge for a dispute.
i.e.
“I challenge your concept…” is not a bad way to begin a “conversation”

Better still:
“I am sorry, but I challenge your concept of….”

or the pièce de résistance….
“Thanks for your contribution. and although you make a fairly reasonable point of….,
I am sorry and I hope you don’t mind, but I would like to challenge your concept of…….”

This follows my 6A framework for conversation when disputing or challenging a statement using  Appreciate, Acknowledge and Apologise. This challenge is usually when there is a failure of the first 3 As from the framework ie using Adjustable, Accountable and Acceptable language.

I appreciate your contribution and welcome your challenge,
as your feedback is always worth considering!