This could potentially go in any one of several forums but this seems as good a starting point as any.
In a Lawrence Block mystery I’ve been re-reading, a character dies in what’s initially thought to be an accident. However, an investigating detective believes foul play was involved, noting that a partially consumed vodka bottle was found near the body, with the victim’s fingerprints from her right hand on the bottle and left fingerprints on the screw-off cap. Since she’s known to be right-handed, he figures this is backwards and someone staged the scene.
This puzzles me - since I’m right-handed and habitually open jars and bottles by holding them in my right hand and unscrewing them with my left. On querying Mrs. Jackmannii (who’s a lefty), I find that she uses her dominant (left) hand to unscrew the lid/cap.
So, the Big Question is: am I an outlier and everybody else takes off the lid/cap with their dominant hand, or is Block’s homicide detective guilty of an unwarranted generalization?