Honestly, I've never quite gotten the hang of what a 'weak' measurement is, but since these are widely used in a variety of experiments involving quantum mechanics, the idea that they don't provide any actual information about the quantum world would be pretty important. An example...
The reality, of course, is that no court, no judge, no human being, is completely free of those entanglements. Yet the court has generally acted wisely in avoiding judgments that would inevitably and utterly besmirch it. With one reckless and partisan ruling, it squandered its most precious ...