Sorry, but you need to prove this

You refuse to address his point? Nice dodge

Cylinders?

this is flat

not round like an orange

your logic is invalid

,....

So what do you thing?

Round like a
Or flat like a ,....

Card. Prove me to me that a circle is round. I'll be waiting

This post was edited by JohnMiller92 on Feb 7 2017 08:10pm

Dispersion is a real thing - it's a word used to describe the fact that different frequencies are slowed (and refracted) differently, causing white light to spread into a spectrum.
Dispersive index and dispersive qualities are nonsense, on the other hand. Only the refractive index matters, since dispersion is still just refraction.

here is proof that earth is flat

Interesting read:

https://en.wikipedia.org/wiki/Eristic

I think this pertains to Card and the flat-earthers. They just don't want to accept reality / the truth