The changes in these and other engine parameters are then consistent with both engines shutting down,

They are shutting down that quarry. They have ceased operations there.

We're filing two months' of cases in a week. Everyone is shutting down and not taking more appointments. It's not like anything you can even imagine.

Low octane can make an older engine knock or ping. But today's computerized engines adjust for lower octane. They don't knock.

Low octane can make an older engine knock or ping, ... But today's computerized engines adjust for lower octane. They don't knock.

The question is not whether the ends justifies the means, or the means justify the ends, but rather are the ends and the means consistent with each other.