How do I respond to someone who says that the Earth is flat?

Meaning flat and level, and if you mention space agencies to him, he says they're liars. It's a problem between me and him, a problem.

No, I'm not with him or against him, but it's an issue that's not really worth it. I mean, whether he says the Earth is flat or I say it's round or whatever, what do you want to get out of it?

Allah, the Blessed and Exalted, will not hold you accountable for saying the Earth is flat.

All those who said, whether it's flat or round, not one of them has definitive proof.

In this matter, both opinions are possible.

So if a person takes this opinion or that opinion, he should not be criticized.

There is room in this matter, meaning, it should not be a matter of loyalty and disavowal.

Regarding this issue.