 3. Our historical boundedness: anti-whiggism and the principle of no privilege. We inquirers are also historically situated. While we are not slaves to our cultural context, we can escape it only partially and with difficulty. Our horizons sometimes prevent us from recognizing our own presuppositions, not to mention future possibilities. Wrote Mary Hesse: “our own scientific theories are held to be as much subject to radical change as past theories are seen to be” (1976: 264). Although we have good reason to hold that our science is superior to that of the past, this does not confer an absolute, ahistorical privilege on our science. Rather than succumb to this perspectival illusion, we must imagine that our successors may look at us as we see our predecessors. We, too, are just a transitional stage into a future that is likely to include much that is beyond our present horizon of imagination. We must avoid the flat future illusion that sees the future a tame continuation of the present (Nickles forthcoming).