p, q:(n:base-domain-type(n)). p = q  p = q 

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Definitions	x:A. B(x), b, p = q, p  q, 1of(t), if b t else f fi, 2of(t), true, t  T, P  Q, Prop, false, P  Q, P & Q, P  Q, x. t(x), , Unit, A, False, x(s),
Lemmas	eq int wf, bool wf, iff transitivity, assert wf, eqtt to assert, assert of eq int, bnot wf, not wf, eqff to assert, assert of bnot, not functionality wrt iff, base-domain-type wf, pi2 wf, pi1 wf