Thousands of artists, including musicians from ABBA, The Cure and Radiohead, have signed a protest letter against using creatives’ work to train aritificial intelligence tools. Musicians, actors and authors signed the letter warning against the mining of their artistry, in what is the latest outcry about AI tools that can spit out synthetic images, music and writings after being trained on huge troves of human-made works. “The unlicensed use of creative works for training generative AI is a major, unjust threat to the livelihoods of the people behind those works, and must not be permitted,” sa…