He was asking about the trend of him commenting with "Source?" leading to downvotes on other posts. I was giving an extreme example to represent why that may be happening elsewhere. I agree that in this case with the 3% rate it's likely not applicable.
[1]: https://news.ycombinator.com/item?id=47167886
[2]: https://news.ycombinator.com/item?id=47167698