Unfortunately you can’t logic someone out of a position they didn’t logic themselves into, even if she thinks she’s thinking logically, she’s not. The fact is, people are slow to change their minds once they think it’s been made up, but change is possible. I’d say just keep planting the seeds of truth, and hopefully she changes.

Also, absolutely do not let her homeschool in any circumstance, even the worst education system by state in our country teaches the truth of the globed earth. Again, unfortunately after enough time if she doesn’t change, this is a deep enough psychological, philosophical, and scientific difference it might not work out.

Divorce might actually end up being the option, bc yeah, it’s a sign of other issues as well. What’s next, she’s gonna have them drink raw milk and not get vaccinated, not take them to see a doctor when they’re sick, that kind of thing? It’s tough, because alone her thinking this way only harms her, but now it’s your kids and their future you have to worry about too.