>medicine is often like debugging a large complicated messy system... A system, that you didn't write and don't have access to the source, Now, try fixing a la

>medicine is often like debugging a large complicated messy system... A system, that you didn't write and don't have access to the source, Now, try fixing a large and complex software system only by observing inputs and outputs only. This is not even going into the fact that how every one will be running a slight different version, which might also be influenced by a million factors such as environment, food habits and past and current medications.... It is virtually impossible, even for moderately large software, even without considering the latter..