Materialism is indeed on shaky ground, but the ground shakes everywhere else, too.

The problem of consciousness has no real solution. A quick way to demonstrate this is via the simulation hypothesis. Consider the following for yourself in first person:

It's impossible to know for certain whether I am in a simulation until I wake up outside of it. Not having observed any evidence of being inside a simulation (probability=0) doesn't necessarily mean I'm certainly in base reality. It could be that the evidence just hasn't been observed yet. And even then, it's impossible to know whether that outer world is a simulation until I wake up in the outer-outer-world, and so on.

That is to say, if my definition of real equals my consciousness equals my existence, I'm really saying that consciousness/reality/existence is a self-defining thing.

Descartes' cogito had unexamined metaphysical convictions. "I think, therefore I am" is not compatible with consciousness because rationality has consciousness as a dependency. If I think back on my entire conscious experience as a timeline, I was conscious before I was rational. I had to derive rationality from experience, not the other way around.

Now I throw away those convictions. "I think" means the same thing as "I am", and "therefore" is a decorative force of habit rather than a reference to logic. In which case, "I think, therefore I am" is the same as: I observe that I observe.

Is the same as: I observe.

Is the same as: I am.

There is no certainty beyond this, only convictions. Even if I'm truly a human brain in a matter-based world, the world would still appear uncertain to this brain in this way.

"A scientist rejecting consciousness is not that different from a nun accepting god in this regard. Neither of them are fully honest with themselves and the world."

That's what I find myself thinking as I take a materialist stance and assume that this is base reality and other people are real in the same way that I am. This appears to fit all of my observations the best, so far, after all.

// end of monologue

And here's my pitch, from me to you:

Let's be provisional materialists together. You can't know if it's the ultimate truth but you can make the correct predictions more often and not be alone while doing it.