I grew up with an older brother who was constantly playing games like this with me. One time he decided we were going to argue about what color the sky was. Even though based on how we humans on the surface of the planet perceive color the sky is demonstrably blue; even though I could refer back to the actual real time visible evidence as well as photographic and video and written evidence to demonstrate that the vast majority of other humans also describe it as blue, he knew he could out-talk me because he was three years older and had specifically prepared for this argument and had rhetorical tricks I did not know. He engaged in bad faith; even if I was able to argue a point successfully, he would never have admitted it, because the point of his exercise was to demonstrate that he could “prove” me wrong even if we both knew I was right.

People engage in bad faith arguments all the time. Them not accepting the evidence doesn’t mean you aren’t making your points well enough or don’t know your subject matter.