For some, “Da Da Da, I don’t love you, you don’t love me, aha aha aha” was simply a silly song, while others saw it as a Dadaist work of art. It was published on February 9, 40 years ago. 84 times “There” and 18 times “aha”: The minimalist message, spread over three minutes and 23 seconds, presented by the singer without emotion…