[Every part of Robert wants to say that's... well, ridiculous. That the world doesn't exist for beings, but rather the other way around; that rainbows would exist whether people could perceive them or not, and indeed some people cannot; that like every other phenomenon the universe is unconcerned with their presence and would continue to have them occur whether they were affected or otherwise...
... And for a moment this shows in his face, in the way he purses his lips and fidgets somewhat.
But finally:]
... I would. To... t-to not ask beyond the surface - to not try to understand - would be unlike everything a s-scientist is supposed to be.
Truly, a rainbow is b-beautiful, whether you understand it or not. But... b-but knowing exactly how it comes into being - understanding why such a thing exists - only makes it even more b-beautiful.
[Action]
... And for a moment this shows in his face, in the way he purses his lips and fidgets somewhat.
But finally:]
... I would. To... t-to not ask beyond the surface - to not try to understand - would be unlike everything a s-scientist is supposed to be.
Truly, a rainbow is b-beautiful, whether you understand it or not. But... b-but knowing exactly how it comes into being - understanding why such a thing exists - only makes it even more b-beautiful.