"substantiate the idea" is a correct and usable phrase in written English.
You can use it when referring to providing evidence or facts to support a certain idea. For example, "The research team was tasked with the goal of substantiating the idea that increased investment in public education leads to improved academic outcomes."
These parts stretch one's patience a little, but they do substantiate the idea of some deep damage having been done.
Thatcher tried to wrong foot Wark by calling on her to substantiate the idea that the poll tax, by now in operation, was a problem.
I could just as easily have written the piece and found substance to support it to substantiate the idea that Frost didn't get Nixon, that Nixon half threw it, in order for these interviews to sell".
I could just as easily have written the piece — and found substance to support it — to substantiate the idea that Frost didn't get Nixon, that Nixon half threw it, in order for these interviews to sell".
These facts substantiate the idea of pushing the classical human dependent network management approaches out of the equation to a great extent.
But her account does not substantiate the idea that genes and DNA contain information or help elucidate the role of genes and DNA.
Considerable analytical, numerical, and experimental work has been carried out to substantiate the ideas proposed within the paper.
The glamour girl, who had not aged much, thanks to plastic surgery, substantiated the idea that blondes have more fun.
A. There is no data substantiating the idea that teaching hospitals are full of very tired people making a huge number of errors.
To the Editor: Dan Ariely provides new data further substantiating the idea that there is no economic reason for paying extremely high compensation to corporate leaders.
If these are substantiated, the idea of tabletop fusion will, indeed, become a pariah.For decades, physicists have sought to achieve nuclear fusion on the cheap.
