Two on a Tower have done...while other eminent critics (I wonder if they are the same) print the most cutting rebukes you can conceive—show me (to my amazement) that I am quite an immoral person...” Two on a Tower Two on a Tower (1882) is a novel by English author Thomas Hardy, classified by him as a romance and fantasy and now regarded as one of his minor works. The book is one of Hardy's Wessex novels, set in a parallel version of late Victorian Dorset. Hardy placed an epigraph at the beginning of this book. The epigraph is from a Richard Crashaw poem,
S (set theory) sets" or "the class of all ordinals" include sets from all stages of the iterative hierarchy. Hence such collections cannot be formed at any given stage, and thus cannot be sets. This section follows Boolos (1998: 91). The variables "x" and "y" range over sets, while "r", "s", and "t" range over stages. There are three primitive two-place predicates: The axioms below include a defined two-place set-stage predicate, "Bxr", which abbreviates: "Bxr" is read as “set "x" is formed before stage "r".” Identity, denoted by infix ‘=’, does not play the role in S it plays in other set theories,