They should give them the questions before hand and have a bunch of researchers do their homework.
Then have the same researchers on-site during debate
Fact check on the spot, then you see who lying and who’s not.
There needs to be consequences for not telling the truth just like real life.
No deflection not changing subject, if you go off course your mic is cut until you get back on track.
Would prob work well in a town hall atmosphere.
There should also be 2 moderators like in a courthouse.
Each cross examined the other candidate.