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So you specialize in performing brain surgery on rocket scientist?Moonbear said:Having done brain surgery, I usually joke "It's not like it's rocket science." But I think both are prone to the same errors...why can't they make a metric ruler that does NOT have inches on the other side? I can't count how many times I've carefully gotten everything lined up on x-rays, got the ruler perfectly squared up to measure distances to target sites, and then realized I was holding it the wrong way and about to measure in inches.