I'm sure i posted this before but there are just pears which are inedible no matter what you do with them. My late father in law ( I miss him and all his wiwe and gentle ways ) had a tree which produced tons of pears, but they were no use raw, cooked, fermented, pickled or any other way. The glory of the tree was the blossom. The rest went to feed the birds through the winter - in his garden and ours and to anybody else who was interested in feeding birds. The rest just had to be disposed of.