Moving the Goalposts on Vaccine Safety

What do goalposts have to do with vaccines?

Nothing really.

They do have a place in folks who argue that vaccines aren’t safe, don’t work, or aren’t necessary though. Moving the goalposts refers to a logical fallacy in which someone decides they want different evidence to win their argument, typically because their previous evidence has failed.

For example, after thimerosal was removed from vaccines, anti-vaccine folks began to say that it was really aluminum and formaldehyde that were the toxins in vaccines.

Just like when playing soccer though, you can’t move the goalposts once you start playing.

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