Furnished with sufficient, correct knowledge(adjective)
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Use "well-informed" in a sentence
"In most of our previous conversations Blair had been calm, cool, very much the well-informed unemotional analyst, comfortable talking the jargon of the nuclear command and control community from which he came."
"He imagined future historians writing approvingly of his self-confidence and his conviction that a well-informed intellect was more important in a chief executive than experience."
"To Dr. Jeffrey Lewis and his extremely well-informed cohorts at the armscontrolwonk.com blog, for penetrating the scrim of PR and euphemism that often masks the truth about our nuclear posture."