let's do linearity first, then we'll tackle singularity.
oh good lord, for a *ton* of reasons, including some of the non-linear causality we mentioned above.
(ed. note: we do not follow this rule when we're at the bar after work.)
we, i, behave how i do in any given instance because of a whole array of factors, in various proportions. when i forget that, of me, or of us, i step wrong.