"discerned through" is a correct and usable phrase in written English.
It is used to indicate the means by which something is figured out or determined. For example, "The truth was discerned through careful observation."
The worms are transparent, and their organs and food can be discerned through their skin.
The jaggedness in "Prologue" could still be discerned through the rich varnish, pulsing like the beating of a heart.
Through some preliminary research, we discovered that the differences between sleep states are mostly discerned through changes in bodily functions.
After the Washington briefing, a senior State Department official said the fire was discerned through satellite photographs that showed smoke clearly coming from the damaged reactor.
Doors bang for no reason; faces loom outside in the darkness, but then can't be discerned through their own reflections in the window panes.
The distinction comes down to intent, which studies show can be discerned through recognition of telltale signs in the face and voice of the liar.
The censored version may shield tender ears, but even with the bleeps, the words are easy to discern through context and lipreading.
Ms. Horne joked about having lost her once brilliant technique, but her tone, as much as one could discern through the amplification, still sounded steady and pure.
The architecture of this aspect of human cognition has been shaped by our evolutionary past in ways that we can now begin to discern through comparative studies of other primates.
They saw, instead of the movie on screen, the movie they had been told about by forests of newsprint, by cascades of critical condemnation … that 'unqualified disaster' they tried to discern through the lights and shadows of the truncated one before them … they seemed to feel cheated somehow for it was, was … a movie … The phenomenon reduced was well, no phenomenon at all.
The implication here seems to be that Hinton is taking his opponent to be making a substantive epistemic assumption that our inability to discern through introspection any differences between a hallucination and a perception must ultimately be explained by our positive ability to discern through introspection that they are events of the same kind.
