People don't always learn better by making mistakes. Sometimes mistakes can help you learn, but sometimes they just send you completely off course, particularly if you've misunderstood something fundamental. If we're talking about physics, you might not realise your final answers are wrong. If you're using them to, say, build a bridge or fix a car, that mistake can cost lives, and how well you learned from it becomes somewhat irrelevant. Even seemingly obvious questions can be necessary for confirmation. The answers can tell you whether or not you're thinking about something correctly.
Do you believe this old saying?
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People don't always learn better by making mistakes. Sometimes mistakes can help you learn, but sometimes they just send you completely off course, particularly if you've misunderstood something fundamental. If we're talking about physics, you might not realise your final answers are wrong. If you're using them to, say, build a bridge or fix a car, that mistake can cost lives, and how well you learned from it becomes somewhat irrelevant. Even seemingly obvious questions can be necessary for confirmation. The answers can tell you whether or not you're thinking about something correctly.