Straight line reflections on a curved surface... sorry, you are just parroting cult talking points and not bothering to experimentally check this for yourself. STOP BEING A CULT PARROT.
The last one above shows that you can have a straight line reflection to the observer on a concave or convex surface.
Your claim is falsified with observable reality. Please stop making that stupid claim that you didn't bother to fact check. Are you a scientist, or a cult parrot?
If you THINK you are a scientist, then start acting like one and fact check and do experiments on claims before you make them, else you just sound like the indoctrinated parrot you claim to hate.
You are a cult parrotist.
LOL. I COMPLETELY debunk your silly claim with easily observable phenomenon and you call me a parrot, when it's you who parroted the initial incorrect claim!
I'm beginning to think that your entire persona of flat earth is just a joke. No one can be this stupid. You simply have to be joking.