Abstract

A demonstration of two difficulties, both prevalent, in modeling. The first is scopal errors, which are often hard to detect because of their subtlety. The second is that two equations, though facially identical, are implicitly conjoined to /different/ inequalities, limiting the range of the variables or parameters in the equations, thereby changing the (here, ecological) interpretation of the equation, and thus its meaning, and therefore whether it is or is not an adequate model.