@astro_jcm
Recently watched the video below.
Brought me back to a time in the 1990s when my dad (degree in math, but only amateur physics interest) had a local guy sending him letters and talking his ear off about how cosmology and light as a speed limit were wrong because clearly speeds are arithmetically additive.
https://youtu.be/11lPhMSulSU

#CrackpotPhysics #AngelaCollier