confuse an issue

However, for the policyholder, the pluses and minuses could confuse an issue where the client simply wants the most effective cover.

Dr. Gilchrest said that Dr. Holick's work in dermatology "is confusing an issue and encouraging people to do things that are harmful."

At the same time he had-when seated in his own arm chair after a heavy mid-day dinner on an August' afternoon with all the windows shut-more power of confusing an issue or taking up a fact wrongly than any man I have ever known.

But I do know about the ways an expert can use his expertise to confuse an issue, especially when he-or, in this case, she-knows she was put in charge specifically because the people who put her there didn't have that expertise themselves.