However, there were cases where I could act on personal knowledge.

But he also said that could be called into question because "others would not have the benefit of my personal knowledge."

He would be a better man for this personal knowledge.

I do not have personal knowledge of the project enough to decide for myself if it is a good plan or a bad one.

It has been happening for many decades to my personal knowledge.

I do not have any personal or firsthand knowledge of those events.

But, he added, "I have no personal knowledge other than what she told me."

The primary doctor should have no more patients than his memory and personal knowledge can cover.

As a result I have been able to add considerably to my personal knowledge of what happened.