The hodge school of debate,
Us: show us some evidence then.
Him: ah but how can you see objects miles away on a curve?
Us: explanation plus more evidence supplied.
Him: silence.
Us: heres a picture from space.
Him: ah the old picture evidence ploy.
Us: still waiting for any evidence you have.
Him: ah but how can you see objects miles away on a curve.
Us: we've already explained that one.
Him: silence.
Next day..
Him: ah but how can you see objects miles away on a curve
Us: swoon.
I'll bring you any further developments, as and when they happen. Don't hold ya breath though.