One notable example right before the launch, SpaceX engineers found a few cracks in the second stage engine nozzle extension.

The nozzle of an arc pistol should never be viewed directly, unless it is certain that no power is available to the equipment.

Some of the items required are made in Europe, as is the case for the AS2000 auto injector, made in Italy. Since these are parts of an isotope ratio mass spectrometer of United States manufacture, they cannot be obtained by Cuba.

But those ways of being rational are not independent of one another, so it's rational for a drug injector to share needles because of a stupid decision that's made by a politician, and it's rational for a politician to make that stupid decision because they're responding to what they think the voters want.