The real question is whether the concern for national security is well founded.

But advocates of jail reform said their concern was well founded.

These concerns were well founded, as the coalition's air force provided military support for the rebels.

"We know now that his concern was well founded."

Health officials and medical experts said the government's concern was well founded.

But do we believe these concerns are well founded?

Their concerns about the treatment of juvenile defendants in the criminal justice system are well founded.

In recent years, studies have confirmed that the concerns are well founded.

That is very worrying and the concern is well founded.

"A lot of people in the military have concerns about that, and their concerns are well founded."