Remarks on Colour line that 'There is no such thing as phenomenology, though there are phenomenological problems.' He was content to regard Goethe's observations as a kind of logic or geometry. Wittgenstein took his examples from the Runge letter included in the "Farbenlehre", e.g. "White is the lightest colour", "There cannot be a transparent white", "There cannot be a reddish green", and so on. The logical status of these propositions in Wittgenstein's investigation, including their relation to physics, was discussed in Jonathan Westphal's "Colour: a Philosophical Introduction" (1991). Although "Remarks on Colour" is considered difficult on account of its fragmentation, his last work,
You Are What You Is You Is", "Tinsel Town Rebellion" and two series of live albums, "Shut Up 'n Play Yer Guitar" and "You Can't Do That On Stage Anymore". Zappa had performed most of the material from "You Are What You Is" on a tour running from March to July 1980 with a band including Ike Willis and Ray White on guitar and vocals, Tommy Mars on keyboards, Arthur Barrow on bass and keyboards and David Logeman on drums. This band recorded the basic tracks of the album in the summer of 1980 after finishing the tour, with guitarist Steve Vai and vocalist Bob