  The elegant Stalnaker/Lewis semantics for counterfactual conditonals works
with distances between models. But human beings certainly have no tables of
models and distances in their head. We begin here an investigation using a more
realistic picture, based on findings in neuroscience. We call it a
pre-semantics, as its meaning is not a description of the world, but of the
brain, whose structure is (partly) determined by the world it reasons about. In
the final section, we reconsider the components, and postulate that there are
no atomic pictures, we can always look inside.
