Have you ever used an obscure fact or piece of trivia as a plot point in one of your stories, and if so what was it and how did you do it?
For example, in my LW story 'Sister In Law Surveillance' the narrator Rachel is able to deduce that her nephew is not her brother's biological son by the genetics for earwax. Wet earwax is a dominant feature, dry earwax recessive, and Rachel is already suspicious that her nephew seems to have nothing in common with his father, unlike the two sisters. The brother's wife, an annoying and vacuous mommy vlogger type, has posted parenting videos of she and the two girls extricating dry ear wax in one of the videos. Rachel watches these videos, notes that her brother also has dry earwax, but from observing her sister-in-law cleaning out the son's ears sees he has wet earwax, a dominant genetic feature impossible for two parents with the recessive genes for dry earwax and therefore Rachel's brother is not the biological father of his son. The cheating wife's biggest secret is exposed thanks to obscure genetics.
For example, in my LW story 'Sister In Law Surveillance' the narrator Rachel is able to deduce that her nephew is not her brother's biological son by the genetics for earwax. Wet earwax is a dominant feature, dry earwax recessive, and Rachel is already suspicious that her nephew seems to have nothing in common with his father, unlike the two sisters. The brother's wife, an annoying and vacuous mommy vlogger type, has posted parenting videos of she and the two girls extricating dry ear wax in one of the videos. Rachel watches these videos, notes that her brother also has dry earwax, but from observing her sister-in-law cleaning out the son's ears sees he has wet earwax, a dominant genetic feature impossible for two parents with the recessive genes for dry earwax and therefore Rachel's brother is not the biological father of his son. The cheating wife's biggest secret is exposed thanks to obscure genetics.