Can a wizard copy a spell from another wizard’s spell book?

@JeremyECrawford can a wizard copy a spell from another wizard's spell book?

— Erik Everson (@platostotle) October 18, 2016

See the sidebar "Your Spellbook" (PH, 114) on how to copy a spell from a book, scroll, or other source. #DnD https://t.co/GKrrI9UDGl

— Jeremy Crawford (@JeremyECrawford) October 18, 2016