Copernicus
Industrial Strength Linguist
I do not see the force of the argument that agency-caused actions take place independently of physical events taking place in a brain, but that is one of those leaps of faith you have to make in order for the argument to make any sense at all. You must concede that immaterial spirits (in the form of "agencies") can manipulate physical reality--e.g. events in a physical brain. That seems a pretty shaky assumption to me, but it seems necessary in order for transworld depravity to be a viable argument.Well, indeed about being responsible for whether or not we have sane, healthy minds -- but as for causal chains that affect our actions, many of those are free agency-caused and I can see the force behind arguing these are out of God's hands (within this conceptual framework) considering things like the butterfly effect. Even if many choices are determined by the environment they're going to be relatively unpredictable, and when future choices are affected by those unpredictable choices then it becomes much more difficult to make the argument that the physical environment alone is responsible for them.
But we can unless your criterion for defeat requires proving a logical contradiction. I do not share your optimism that that is possible in logical arguments over the existence of God, although I've seen some pretty good logical arguments against the omnimax God. Theists with good imaginations simply create new "transworld depravity-like" scenarios to keep the argument going. You have committed yourself to proving a contradiction in their thinking, so they get to call the tune. One isn't likely to arrive at a "squared circle" moment in those arguments, although one can always hope.No one can imagine their way out of a truly illogical scenario, though. No matter how advanced your imagination is it simply isn't possible to conceive of a square-circle or a set of all sets which do not contain themselves as members. The PoE does work and it does show a logical contradiction so long as we defeat transworld depravity, which we can.
The real value of logic is not just in proving contradictions but in choosing which side of a contradiction to believe (by proving consistencies with beliefs that are certain or beyond reproach). You can always prove one side of an empirical argument by declaring evidence from reality out of bounds. Human cognition would not even work if we couldn't maintain contradictory beliefs, because we would never be able to change our minds about anything.
I had a kind of epiphany in a robotics conference a few years ago when the discussion turned to nondeterministic methods for robot navigation around obstacles. One of the participants emphatically declared that we needed to have better, faster methods for eliminating contradictions. A friend of mine almost exploded (well, that is SOP for this particular friend ) that robots had to have ways of embracing and handling contradiction. The ability to believe two incompatible propositions is necessary before one can make a choice. If beliefs have to be based on certainty, then it becomes impossible to make any decisions at all, so the robot must always question its own decisions at some level. Evidential arguments are ultimately more important than purely logical ones, because they make it possible for us to navigate and survive in an uncertain world.
Last edited: