we live in an age of alternative facts and personalized realities, where you can safely and comfortably believe whatever the f*** you want, regardless of what the disciplined study of math and science reveals to us, or, in the case of "flat-earthers," what the simple observation of the curvature in the horizon line should reveal to us. and this is no longer a "kids these days" kind of complaint; it's a growing problem that defies and transcends age, gender, and ethnicity. as a teacher of critical thinking, i've had students that span generations all succumb to the temptation of confirmation bias, which would be a correctable error if they were willing to pursue a course of fact-checking and cross-reference. often, they're not. it pains me that a technology as profoundly transformative as the internet has not democratized the spread of knowledge, but instead has fractured the receipt of information into millions of cozy little echo chambers. anyway, my apologies for the sidebar. soapbox dismounted.