Even worse in this context it implies "math is hard" for the non male gendered.
“Manuscript” means written by hand or typed.
Manu is Latin for ‘by hand’.
(In French, the word for hand is ‘main’. In Spanish and Italian, it’s ‘mano’.)
That’s why it was originally called the “mansplain of relativity”. But when this was deemed offensive and women couldn’t understand a word of it anyway, they renamed it to something that didn’t leave out any underclass or subset of oppressed or downtrodden people.
All of modern quantum physics is based on a foundation of photon particles. Particle this, particle that, wave/particle duality nonsense that was already debunked thousands of years ago by Egyptian, Greek and Indian cultures.
In the more modern era, J.J Thompson, Oliver Heaviside, Charles Proteus Steinmetz, Eric Dollard, Nikola Tesla, James Clerk Maxwell, and others all refuted aspects of Einstein's nonsense, rejecting it. Einstein would've gotten nowhere without the help of his wife Anna's organizational and writing skills. Albert E would have been laughed out of all the Universities if C.P. Steinmetz hadn't edited and fixed what he recognized as many errors in Einstein's equations.
Like today's media, more rational minds of the early twentieth century were out-cheered by the cabalistic shills for Albert Einstein.
Even if you consider this post from left field and possibly nuts, as a way of expanding your mind, please consider the actual content of the following three videos (if you're able).
Einstein's Fraud and Worse Exposed
Debunking Einstein Relativity Refuted by Dr. Oleg D. Jefimenko
LOL
At first glance I thought they found the Jeffrey Epstein suicide note. He mailed it in with his absentee ballot! LMFAO