A "good debater" is someone who can argue their point effectively and persuasively, using logical reasoning and evidence. They are skilled at presenting their opinions clearly and countering opposing arguments. Full definition
Maybe the other side needed better debaters, but Monckton handled them all well. (wattsupwiththat.com)
If you think that this guy is a good debater and that proves he is correct, you should see some of the Flat Earth Society members in a debate. (religion.blogs.cnn.com)
But a good debater would never solely accept the burden of proof. (firstthings.com)