The first part is what my husband tells me.

I do recognize that Medical Laboratory Scientists are a very superstitious lot especially funny since our degree and certification include Scientist. Don't say it's slow or quiet because it's getting to get stupid busy (and everyone will blame you). Don't run quality control more than required because you are tempting failure and will have to do a look back of all the testing to make sure it was accurate. We jokingly put an elf on the shelf out that had FDA written on the hat and the FDA showed up for an unannounced inspection a week later. I'm a Lead and every time I bring my Lead work to the bench with me, we get so busy with patient samples and orders that I can't touch it. All are definitely confirmation bias situations.

Hypothesis*, and it is very popular with nurses. Unfortunate, but people still believe many strange things.

I sleep in a completely blacked out room yet I know when it's near the full moon because my sleep gets very broken and restless.