Come now, let us argue it out. ISAIAH 1:18 Philosophy, Alvin Plantinga has remarked, is just thinking hard about something. If that is the case, then doing good philosophy will be a matter of learning to think well. That serves to differentiate philosophy from mere emotional expressions of what we feel to be true or hopeful expressions of what we wish to be true. What, then, does it mean to think well? It will involve, among other things, the ability to formulate