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Darran's avatar

---and the view that ordinary objects—what philosophers sometimes refer to as medium-sized dry goods (e.g., chairs, cats, people)—are entirely reducible to and determined by their microphysical base---

This is something, as a physicist, I've always wondered about Physicalism as a philosophy. There are strong philosophical arguments against Physicalism, but it's also a two page proof in quantum mechanics that objects are not reducible to their microphysical base and even more solidly in quantum field theory there isn't really such thing as a microphysical base in that sense.

It just seems based on imagining a certain version of 19th century Statistical Mechanics was literally true, there's no modern scientific support for it. I have no idea what physicalist philosophers mean by "physics" anymore.

comex's avatar

> since physicalism is quite obviously (indeed, often explicitly stated to be) incompatible with much of what’s listed above, particularly the reality of moral facts

It doesn't seem obvious at all that there's an independently correct answer to every moral question, considering that people often differ in their moral judgements, and that when a dispute occurs, no objective method exists to determine which side is right.

But if there isn't an independently correct answer to every moral question, then it seems nonintuitive that there would be an independently correct answer to *any* moral question. There are areas where most people agree; why not leave it at that?

Keep in mind that there's a difference between acknowledging that differing moral views exist and being willing to tolerate them. I am willing to judge anyone who does something that *I* consider immoral, regardless of whether they themselves consider the action immoral.

I admit that the last principle is nonintuitive, but the consequences of moral realism are even more nonintuitive to me.

> genuine agency

I believe that we are "responsible" and "culpable" for our choices, even though our choices originate from physical mechanisms in the brain, and might in theory be perfectly predicted by an entity with extraordinary knowledge of the exact state of the world (if the universe is deterministic, which it probably isn't).

After all, anyone can make predictions. If you know someone well enough, you can probably predict their moral choices with very high accuracy, and identify the reasons behind those choices. Yet we don't treat that as absolving them of much, if any, responsibility. Why should it work any differently if some hypothetical entity could make the same prediction with 100% accuracy?

> and the existence of composite objects that are more than just the arrangement of their micro-physical components

I don't see what makes this obvious either. If I take three cylinders and a flat board and connect them in a certain way, then I have built a table. It's obvious that the table exists, but it's also obvious that "table" is just a classification, a mental tool. There's no rule of the universe blessing it as an official table, and other people might have slightly different ideas of what counts as a table and what doesn't.

Admittedly, the classification isn't completely arbitrary. It's based on whether the parts together accomplish something they couldn't do alone: standing upright. Only a specific arrangement of the pieces accomplishes this: that is a mathematical fact that derives from the laws of physics. Or in other words, the concept of a table is an abstraction that naturally emerges from the laws of physics, just as a Platonic solid is an abstraction that emerges from simpler geometric axioms. To that extent alone, the concept of a table has an independent existence. But physicalism does not deny that mathematical facts "exist" in that sense.

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