Rolls-Royce Phantom VII and the self-righting wheel centres featuring the words 'London 2012' surrounded by the Olympic motto, 'Citius, Altius, Fortius' ('Faster, Higher, Stronger'); tread plates identify each car as 'One of Three'. The vehicles were unveiled at the 2012 London Olympics closing ceremony. The Art Deco cars are versions of the Phantom inspired by the Art Deco era. Retail model includes a choice of 4 body colours (infinity black, Arabian blue, powder blue or Arctic white) with twin coachline with an Art Deco motif, illuminated Spirit of Ecstasy, Art Deco headrest embroidery, bespoke inlays on piano black veneer, tread plates with Art
Higher-order logic "classical" higher-order logic. However, modal higher-order logic has been studied as well. According to several logicians, Gödel's ontological proof is best studied (from a technical perspective) in such a context. Higher-order logic In mathematics and logic, a higher-order logic is a form of predicate logic that is distinguished from first-order logic by additional quantifiers and, sometimes, stronger semantics. Higher-order logics with their standard semantics are more expressive, but their model-theoretic properties are less well-behaved than those of first-order logic. The term "higher-order logic", abbreviated as HOL, is commonly used to mean higher-order simple predicate logic. Here "simple" indicates that the