#subpost trust me if it's 40K lore, you're only getting like 20% of it because unless the person telling you is INCREDIBLY hyperfocused they've only got 80%. The average Warhammer player/fan/employee knows maybe like 60% of the ginormous semicoherent sprawl that is 40K canon.
like f'rex only recently did I learn Ursukar Creed is currently Fabius Bile's war trophy after the fall of Cadia and THERE IS LITERALLY NO REASON you would ever need to know this to paint or play 40K.