You mean Alexa may never know what we mean by "light" or "turning it on". Neither would an intelligent alien that doesn't rely on sight. That doesn't entail that such a creature isn't intelligent, or doesn't have a mental life, or its operations doesn't operate on a model consisting of a set of propositions.
> There is no "logic" which can specify such things in a limited set of propositions: the effect of the world on animals is not merely to add propositions to their "set of beliefs".
That's conjecture, although I think the way you've framed it is misleading. Instincts are also "beliefs" in this model, and the operation of a mind can have multiple layers with inconsistent sets of "beliefs" that sometimes drive seemingly inconsistent behaviour.