I am interested in the special human abilities to create and acquire knowledge of logic, mathematics and science. These interests in philosophy of logic, mathematics and science lead me to interests in the related problems in epistemology and metaphysics, and since language is essentially implicated in much our our knowledge, to philosophy of language as well. My methods include gleaning whatever is of use for my inquiries from the histories of logic, mathematics and science, and from the cognitive sciences. My current research is focused mainly on issues concerning the logic and ontology of vagueness, and on the nature of logic and logical operations.