I thought this sounded like fault injection, and wondered if there might be a parallel in testing
Apparently, one rock band had a book of requirements for setting up their show. If a seemingly silly requirement was missed, it was a signal that other things might be missed as well. The requirement: a bowl of m&m’s with brown ones taken out.
I suppose in testing, if we notice one thing is missing, we can often suspect that other details may have been missed as well. When we notice problems, we can/tend to think two things: that there are probably more bugs (they tend to cluster), and we should see how bad the bug we found can get.