It is common knowledge that we hear more bad news than good.
No reason to avoid his questions, especially not if the information he wants is common knowledge at home.
It will not yet be common knowledge what we have found.
He wanted to be off the streets before his return became common knowledge.
In no other way could the secret of my true nature have become common knowledge.
In fact, it's common knowledge around the industry that things are going almost too well.
"Is my love life common knowledge in the whole house?"
And we may have lost a lot more of that common knowledge over the past seven days!
All this is common knowledge and I need say no more.
It was common knowledge, available to him had he but known where in his mind to look.