Him not having done research on the matter is purely an assumption on your part, not as if he should really need to though, the burden of proof should lie on the one claiming something exists. I just can't get over how ridiculous it is to dismiss somebody's opinion on something just because they haven't "experienced it". Do you also think only those that claim to have seen ghosts are worth listening to when discussing the existence of ghosts?
And I proved it exists already. As for the ghost example, only if the experience of ghosts are a condition of something (race, age, gender, etc...) and that those outside that condition are incapable of seeing them. Consider this, if only green people see ghosts and a purple person says ghosts don't exist, how likely are you to consider the experience of purple people for the existence of ghosts? Not their research of ghosts but their experience with them as grounds for their dismissal of their existence.
You didn't though. You gave evidence that it may exist, but not definitive proof of anything. If 10 white people and 10 black people apply for a job and the company hires only 5 white people, does that prove racism? No, not at all. There's a possibility that racism was involved, but it certainly doesn't prove it. The only people that would know for sure whether racism was involved would be the people who made the hiring decisions, but they're certainly not going to admit it, are they? If some of those black people claim they never got the job due to racism, are they right? Possibly. If those white people who did get the job deny that racism was involved, are they right? Also possibly. So if they're both possibly right why only listen to one of them rather than considering both perspectives?
For the green/purple people, why take either of them at face value? Why not ask why one group can see ghosts and the other can't? Why not question if what the green people are seeing are really ghosts? And that translates to the real world as well. If a black person claims something is racist, maybe it is, but just because they say it's racist doesn't make it so. And if a white person claims something isn't racist, maybe they are saying that because they lack information on the topic, but maybe it's also because it isn't actually racist, them being white doesn't make them automatically wrong.