I spent two decades writing reviews for technology products that featured a mandatory score on a five-point rating scale1. The idea of applying a numerical rating to a product appears to be an early 20th century invention, most famously adopted by film critics. I was never a fan of the idea, to be honest. Step away from the objective world of precise measurements and things get squishy awfully fast. You end up using the precision of numbers to measure the imprecision of sentiment. Beyond telling you if I like the product or not—if Roger Ebert likes the movie or not—does the difference between a 3.5 and a 4 really tell you much? (When I started at Macworld, the magazine had just instituted a completely bonkers rating system where every product was scored twice, both out of five stars and out of 100 points (actually out of 10 points with a mandatory tenth rating, wasting a lot of perfectly good periods), so you’d end up with ratings like 4 stars/8.7. If you’re reviewing hard drives I suppose it’s arguable that you might need to differentiate between a 7.3 and a 7.4, but in most cases that level of precision is pointless and arbitrary.)

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