For some reason it really irks me that they are using the word defect. It's like they forgot that the rules/model we set follow what happens in reality. If there is a defect, it's not in spacetime, it's in our understanding.
It's a commonly used word to describe irregularities in lattices, such as grain boundaries in metals or imperfections in crystals.
That makes sense
I was wondering about this too, thank you for the insight!
If your spacetime contains black holes you may be entitled to compensation from the manufacturer. Please retain this notice and your receipt. Known in the state of California to cause spaghettification. Offer not valid in worldlines crossing the event horizon.
It's a technical term in crystallography/solid state physics as well.