So you try it first, and only adjust when you have real evidence that this is not working for you. That's the whole point -- in order to find evidence that it

So you try it first, and only adjust when you have real evidence that this is not working for you. That's the whole point -- in order to find evidence that it isn't working, you have to start looking at the false negatives -- or that is to say, where the "light is not".