It was a red pill for your computer.
What if it was turned? What if some villain convinced it to switch sides, by subverting its code, or by subtly altering it at the manufacturer?
That is, what if Descartes' God was a sadist who *wanted* to torment him?
This was a nightmare scenario in 2002, one that the trusted computing advocates never adequately grappled with. In the years since, it's only grown more salient, as trusted computing variations have spread to many kinds of computer.
15/
The most common version is the UEFI - ("Unified Extensible Firmware Interface") - a separate operating system, often running on its own chip (though sometimes running in a notionally "secure" region of your computer's main processors) that is charged with observing and securing your computer's boot process.
16/