Infinite XP Glitch

You can literally do an infinite xp glitch using books and grindstone (also duplicates)
Items: 2 book n quill, any enchanted armor, grindstone
Steps to recreate:
1. First type anything in the book and sign with any book title and author
2. Now combine the book and quill and signed book in inventory itself
3. Get any enchanted armour
4. Keep the signed(combined book) on first slot and enchanted armour and second slot
5. Now keep the armour in grindstone and keep pressing on the disenchant armour
6. Now u get unlimited xp also duplicated armour
You can also find more info in this video:
https://www.youtube.com/watch?v=LxSCGUpxsPs