Hector Martin is the archetypal bullshitter as defined by Harry G. Frankfurt in his magnum opus, "
On Bullshit".
For those not familiar with "On Bullshit", Harry opines that there's a clear difference between the liar and the bullshitter: the liar accepts that the truth exists and deliberately opposes it. As counterintuitive as it sounds, the liar has respect for the truth.
On the other hand, the bullshitter has no respect for the truth or the lie. They create their own narrative from the ground up, which frequently includes a kernel of the truth; often by design, but sometimes completely by accident. This is why the bullshitter is so dangerous, especially when they have a platform.
tl;dr: the bullshitter rejects your reality and substitutes their own