Given that you yield in this case to a plumber, who may be very knowledgeable about the longevity of your pipes, but who may not be educated at all in issues of human health—or even care about your household—I fear for your children. In this example, you demonstrate grave irresponsibility.

I have intimate knowledge of engineering and bridges; I have intimate knowledge of doctors and the current state of the medical profession; I have intimate knowledge of the state of business and politics in our society. I do not trust a person because they are a professional or because they stack letters behind their name. I trust a person because they demonstrate good character with tested and proven integrity.

I have an advanced technical degree from a renowned university, but I do not promote it to give false weight to my arguments. My pipes hold water. Sometimes, too much education spoils the fruit.