In point of fact the three actions of perceiving, determining, and responding were sequential; but so infinitesimal were the intervals of time between them that they appeared simultaneous.
And this could sort of be put on the back burner, when students are really stressed out about making sure they get all of the points in task achievement and coherence and cohesion.
The thing that we leaned back was zooming in and looking at color specifically, but then zooming back out to a different altitude of, does this feel like it's cohesively mimicking what you would see in the real world?
Because this historical language was never written down, we can only reconstruct by comparing its descendants which is possible thanks to the consistency of the changes.