Obsessive-compulsives, so often filled with doubt, may become terrified of making a mistake and start compulsively correcting themselves and others. One woman took hundreds of hours to write brief letters because she felt so unable to find words that didn’t feel “mistaken.” Many a Ph.D. dissertation stalls—not because the author is a perfectionist, but because the doubting writer with OCD can’t find words that don’t “feel” totally wrong. When
