Stack Exchange network consists of 177 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
The deleted answer to https://judaism.stackexchange.com/a/12100/732 has four delete votes, but two of them are from the same person.
How did that happen?
Checking the data, those two votes came in at the exact same time, so perhaps the user double-clicked on the delete link?
We generally protect against this, but in very rare cases it can still happen.