The phrase "a more discernable" is correct and usable in written English.
It can be used when comparing the clarity or visibility of something, indicating that it is easier to perceive or understand than before.
Example: "The new design features a more discernable layout, making it easier for users to navigate the website."
Alternatives: "a clearer" or "a more noticeable".
Since the duo's 2002 reunion, the disparity in their temperaments has resulted in a more discernable oscillation between light and dark sentiments in the music.
After 17 Ma, it is clear that there is a more discernable gap so that even the fastest cooled grains show a significant lag between cooling and deposition.
I became an expert on drinking in college, but Tony's is designed for people with a more discernable palate than a typical frat boy.
Looking to succeed where political action and discourse has been tenuous, Iceland's own Olafur Eliasson recently created a public art installation meant as a reflection on climate change, done in a manner more discernable than the theoretical rhetoric that often surrounds the issue.
Generally, further improvements on the predictive performance rely on more discernable features or different combination of the currently proposed feature.
However, unlike the more discernable symptoms of psychosis, identifying young people who might be in the prodromal phase of a psychotic illness is more challenging.
It appears that high intensity jumping exercise combined with honey supplementation resulted more discernable effects on bone.
A white sheet hung behind the release platform ensured the bats flew perpendicular to the camera view and also made the bats more discernable in the footage.
The effect of NF-κB blockade on cell death was minimal at 4 hours of TNF treatment and it became more discernable at 8 and 24 hours.
Nevertheless, combined 80 jumps per day with honey group elicited more discernable effect on reducing the level of serum bone resorption marker than 20 jumps per day combined with honey supplementation.
It seems that jumping exercise in both high and low levels of intensity combined with honey supplementation may elicit beneficial effects on bone by increasing level of bone formation marker, nevertheless, more discernable effect was observed in combined 80 jumps per day with honey group.
