  An extended technical discussion of $S$-values and unconditional information
can be found in Greenland, 2019. Here we briefly cover several technical topics
mentioned in our main paper, Rafi & Greenland, 2020: Different units for
(scaling of) the $S$-value besides base-2 logs (bits); the importance of
uniformity (validity) of the $P$-value for interpretation of the $S$-value; and
the relation of the $S$-value to other measures of statistical information
about a test hypothesis or model.
