XKCD #2501, two stick figures speak with each other: "SILICATE CHEMISTRY IS SECOND NATURE. TO US GEOCHEMISTS, SO IT'S EASY TO FORGET THAT THE. AVERAGE PERSON PROBABLY ONLY KNOWS THE FORMULAS FOR OLIVINE. AND ONE OR TWO FELDSPARS." "AND QUARTZ, OF COURSE." "OF COURSE." Caption: EVEN WHEN THEY'RE TRYNG TO COMPENSATE FOR IT, EXPERTS IN ANYTHNG WILDLY OVERESTIMATE THE AVERAGE PERSON'S FAMILIARTY WITH THEIR FIELD.
https://media.hachyderm.io/media_attachments/files/113/041/379/547/539/722/original/f13a681f4b9c9806.png