See https://news.ycombinator.com/item?id=11243904 https://news.ycombinator.com/item?id=11243904 above as to why the cost issue is a risk assessment / return ana

See https://news.ycombinator.com/item?id=11243904 https://news.ycombinator.com/item?id=11243904 above as to why the cost issue is a risk assessment / return analysis. In certain scenarios in which potential harm is high from an incorrect diagnosis, it's worth the cost to perform the test completely independently.