Indeed.

It's also worth noting the saying "Mad as a hatter" originated in the 19th century and can be a possible red pill.

Trappers would preserve furs with mercury and the hatters would make felt out of the fur to make their felt hats.

The constant mercury exposure drove many of them insane.

Mad as a Hatter: Global efforts to reduce mercury emissions

Did you ever wonder what made the Mad Hatter from Alice in Wonderland so mad? The phrase “mad as a hatter” actually comes from Mad Hatter disease, better known as mercury poisoning. In the 19th century, fur treated with mercury was used to make felt hats. Hatters were confined in small spaces and breathed toxic mercury fumes, resulting in “mad” or irrational behavior. Today mercury is used in manufacturing processes, as a vaccine preservative, in dental amalgam fillings, certain medications and cosmetics, and in fluorescent light bulbs. But the most common cause of mercury toxicity in humans results from eating fish and shellfish that have been contaminated by industrial runoff.

https://news.vanderbilt.edu/2013/02/18/mad-as-a-hatter/

Archived link - https://archive.ph/oCu6d

Notice Vanderbilt University doesn't dare mention the mercury in vaccines has been rebranded as thimerosal.

And if you do try to use these facts to red pill somebody, prepare for the "ackshually" brainwashed victim to Google thimerosal once you bring it up and repeat CDC propaganda about how it's safer than methylmercury. And make sure you're aware they've removed thimerosal from Measles/Mumps/Rubella (MMR), and varicella (chicken pox), polio and pneumococcal conjugate vaccines never contained it.

https://www.cdc.gov/vaccinesafety/concerns/thimerosal/index.html

Archived link - https://archive.ph/PhM3D

And then counter with this source, also from the CDC, and ask your "ackshually" brainwashed victim to count how many of the vaccines on this list AREN'T mentioned on the previous link.

https://www.cdc.gov/vaccines/vpd/vaccines-age.html

Archived link - https://archive.ph/PqhGN