This'll be off topic, but oh man I just can't help it...
Do you think Data's appendages work independently?
I suppose they could, nothing is ever directly said/done, that explicitly excludes that they might, except that any time we've seen anything detached from him, it's been inert, or at least seemed that way... except his head in Disaster.
Also, any time something's been detached, there's been a noticable lack of powered blinking lights, like we'd normally see behind a removed panel. It almost seems antithetical to Soong's intent, to make his parts independently powered & functional, when his goal was to approximate a human, with tech.
Were B4's separate parts individually powered? I can't recall. That's how they located them all, wasn't it? The power signatures?
I honestly never considered that Data might have independently functional limbs