The poster literally said they were going to intentionally say things that they know are false.
That's pretty much the definition of a liar and outright deceptive.
Besides that, the tactic of trying to be debative and in this case outright dishonest and slightly combative is an incredibly terrible method for interviews.
Honestly the poster should be banned from giving interviews.
The poster is using an interview technique of creating an imaginary scenario, e.g. "deal with a work colleague who is advocating a sub-optimal position". This seems entirely reasonable.
It seems to me that you've jumped to a very strong conclusion, based on a brief conversation that you have interpreted in the least charitable way possible.
That's pretty much the definition of a liar and outright deceptive.
Besides that, the tactic of trying to be debative and in this case outright dishonest and slightly combative is an incredibly terrible method for interviews.
Honestly the poster should be banned from giving interviews.