Detectable or derivable by use of the senses or the intellect.(adjective)
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Use "discernable" in a sentence
"Does Uncommon Descent not result in discernable phylogenetic trees?"
"Here's what I said in an email to a friend, and I don't think I've much improved on it above: The problem with most fiction, actually, is that the writer's intentions are all too clear so, alas, they are mostly discernable, which is just no fun at all."
"Their link page has lots of good links, but not in any kind of discernable order."