It's very unfair to spew the Quack word around as so many do this. Those who have gone to higher education in their fields are not quacks. They make mistakes, all doctors do. The surgeon who did my hip replacement really messed me up but he's also done many good replacements. I never called him a quack but he did goof on my body. And I 've thought about why and have my theories. Don't believe he meant to but believe he was in a hurry,,,surgery is not done in a hurry.