Well versed in the theory of classification, he was poorly versed in its practical application, and I doubt that he could tell a sperm whale from a baleen whale!
A lot of people may not be very well versed with the science, the facts of climate change… to be honest, they can at times be quite complex, quite dense.
As such data hardly existed, they set about collecting it themselves. Having grown up on a small farm in India, Dr Jayaprkash is well versed in using a backpack sprayer.
That minister was galbet, or admiral of the realm, very much in his master's confidence, and a person well versed in affairs, but of a morose and sour complexion.