The phrase "according to a knowledgeable" is not complete and therefore not fully correct in written English.
It can be used when referencing information or opinions from someone who is well-informed or an expert in a particular field, but it needs to be followed by a noun, such as "source" or "expert."
Example: "According to a knowledgeable source, the project will be completed ahead of schedule."
Alternatives: "according to an expert" or "based on informed opinion."
The two men hugged, according to a knowledgeable Palestinian.
Yet sales fizzled, totalling just ten thousand, according to a knowledgeable publishing source.
According to a knowledgeable western official, there is no evidence of Iranian collusion with suspected al-Qaeda members.
(According to a knowledgeable source, Bezos owned 3.3 million shares of Google stock in 2004, when the company went public.
The morning after the vote, O'Rourke e-mailed a local AIPAC activist, Stuart Schwartz, to explain his vote, according to a knowledgeable person.
In 1995, another C.I.A. assessment concluded that Iran was three to five years from having a nuclear weapon, according to a knowledgeable former American official.
According to a source knowledgeable about North Korean affairs, Pyongyang indicated in mid-April that it was willing to talk to Beijing.
The company is looking at several small education-related companies, though no deals are imminent, according to a person knowledgeable about News Corporation's preliminary strategy.
An exception is Renaissance Technologies, whose $6 billion Renaissance Institutional Equities Fund is up 21 percent through June (not including fees), according to a person knowledgeable about the fund.
"A group of private businessmen will meet on the sidelines to push for privatization of state firms, which they view as a 'vital second round of reforms,' according to a person knowledgeable about their plans," Reuters reported.
Bank of America played hardball on request, and the commission's staff was unlikely to get enough votes from commissioners to subpoena the bank, according to a person knowledgeable about the matter.
