Such information is essential these days before an informed opinion can be developed on national security policy.

Both candidates said they did not have access to classified information needed to offer an informed opinion.

If a man is too prejudiced to take an informed opinion, what can be done for him?

The most informed opinions on the subject seem to be, well, it couldn't hurt.

"Why wouldn't you ask those who've actually eaten there for an informed opinion?"

It excuses you from the responsibility of having an informed opinion about things that matter.

There is, for now, no community of informed opinion to give his work either support or constructive resistance.

I have nowhere near enough knowledge on this to make an informed opinion.

In this situation many more people feel they can have an informed opinion about the overall strategy.

"It's contrary to the overwhelming body of informed opinion, both inside and outside the administration."