"Throwing coal into a furnace" hasn't been a job for about a hundred years now. On other than the smallest scale (say, a home coal furnace) that's been done wit

"Throwing coal into a furnace" hasn't been a job for about a hundred years now. On other than the smallest scale (say, a home coal furnace) that's been done with machinery for longer than Biden has been alive. Does he really not know the difference between being a coal miner (which is a skilled trade, if dirty, strenuous, and dangerous) and being a furnace stoker (which historically required nothing but a strong back)?