Expertise in one field does not carry over into other fields. But experts often think so. The narrower their field of knowledge the more likely they are to think so.
Robert A. Heinlein"Peace" is a condition in which no civilian pays any attention to military casualties which do not achieve page-one, lead-story prominence-unless that civilian is a close relative of one of the casualties. But, if there ever was a time in history when "peace" meant that there was no fighting going on, I have been unable to find out about it.
Robert A. HeinleinIt's a long story. Want a refill?" "No, let's start the steak. Where's the button?" "Right here." "Well, push it." "Me? You offered to cook." "Ben Caxton, I will lie here and starve before I will get up to push a button six inches from your finger" "As you wish." He pressed the button. "But don't forget who cooked dinner.
Robert A. Heinlein