The phrase "all the knowledgeable" is correct and usable in written English.
It can be used to refer to a group of people who possess knowledge or expertise in a particular area.
Example: "In this discussion, we aim to gather all the knowledgeable individuals in the field to share their insights."
Alternatives: "everyone who is knowledgeable" or "all those who are informed".
"At 16 or 17, he befriended them all," said the knowledgeable person.
I can tell you that in my area of expertise the opaque world of global wealth management unless you have an independent forensic expert at your side (and almost all the experts knowledgeable about industry shenanigans are gainfully employed facilitating industry scams, as opposed to decoding or exposing them), you are at risk.
Guatemalan, Ethiopian and El Salvadoran coffees are all popular, with the knowledgeable baristas meticulously channelling their complex flavours into perfectly balanced drinks. .
On this issue, Joan and I discussed the idea of a support group for youth voters in which information is simplified and updated in hopes of making us all more knowledgeable to the point where we trust ourselves with voting.
"They're all so knowledgeable about the books, and they know their customers". Employee Bob Johnson recently steered Harter to a book called "Too Young to Die," which includes two pages on the mysterious death of actor George Reeves, best known for his role in the 1950s television series "Adventures of Superman". Johnson knew that Harter was writing a book on the subject.
Best of all, the hotel provided us a knowledgeable guide, Didit, for Borobudur and Prambanan as well as our hike.
"I did not believe that Teresa was all that knowledgeable about any of the finances of her family until ultimately she became the breadwinner," he told People.
Regent's tours run like clockwork though and the guides I met were all friendly, knowledgeable and excellent representatives of their respective countries.
