Becoming and Relation: Difficult Thoughts As for formal logic, I do regret not being more acquainted with it, if only because one ought to know one's enemy to all the better to engage it. — StreetlightX
How can you know it's your enemy if you don't know it?
I'm not really a fan of Sider or Lewis as metaphysicians myself, but Lewis' contributions to logic with his logic of counterfactuals, counterpart theory, centered worlds, etc. are not only brilliant technical innovations, but provide tools for formalizing tricky concepts in fresh ways. It may be that I'm biased toward formalism because linguistics needs formalism to survive, far more than philosophy, but to dismiss the really interesting things these guys have done with their logics on grounds of some vaguely felt dissatisfaction with what you
think (without really knowing) represents a fundamental metaphysical misconception is naive.
I mean, whether you like it or not, counterfactuals, for example, have a certain logic to them, in the way they license inferences, and in struggling with that Lewis is doing something concrete with interesting formal consequences that, for all their protests, continental philosophers
are not doing. This is not to say he's the continental's superior, but just that it needs admission that your 'foe' has resources you don't, and to admit that in many ways he
is more sophisticated than you. The reverse might also be true, but then I think the incumbency runs both ways.
I also think drawing indiscriminately from scientific sources has a danger of tourism to it, but maybe that's a separate issue.