Ancient Greek Logic: Aristotle Beginning Modern Logic: Leibniz Scientific articles on formal aspects of Ancient Western and Indian Logic © Klaus Glashoff Medieaval Indian Logic: Dignaga Quotation of the day: "Conceptual devices that have been developed by Western philosophical thought will be indispensable tools of translation, interpretation, and analysis; but we will have to use them cautiously. We have to be constantly aware that our own ontological concepts and premises are problematic." Wilhelm Halbfass