Template:Are You Sure/May 9

• ... that tickets for the Human Flea Circus are being given away free due to COVID-19 lockdown restrictions?

• ... that Jensen's inequality, named after the Danish mathematician Johan Jensen, relates the value of a convex function of an integral to the integral of the convex function; and that in its simplest form the inequality states that the convex transformation of a mean is less than or equal to the mean applied after convex transformation; and that it is a simple corollary that the opposite is true of concave transformations; and that Jensen's inequality generalizes the statement that the secant line of a convex function lies above the graph of the function, which is Jensen's inequality for two points?