%   ORIGINAL: 'h4/thm/pred_set/CARD_UNION_'
% Assm: HL_TRUTH: T
% Assm: HL_FALSITY: ~F
% Assm: HL_BOOL_CASES: !t. (t <=> T) \/ (t <=> F)
% Assm: HL_EXT: !f g. (!x. f x = g x) ==> f = g
% Goal: !s. 'h4/const/pred_set/FINITE' s ==> (!t. 'h4/const/pred_set/FINITE' t ==> 'h4/const/arithmetic/+' ('h4/const/pred_set/CARD' ('h4/const/pred_set/UNION' s t)) ('h4/const/pred_set/CARD' ('h4/const/pred_set/INTER' s t)) = 'h4/const/arithmetic/+' ('h4/const/pred_set/CARD' s) ('h4/const/pred_set/CARD' t))
%   PROCESSED
% Assm ['HL_TRUTH']: T
% Assm ['HL_FALSITY']: ~F
% Assm ['HL_BOOL_CASES']: !t. (t <=> T) \/ (t <=> F)
% Assm ['HL_EXT']: !f g. (!x. happ f x = happ g x) ==> f = g
% Goal: !s. 'h4/const/pred_set/FINITE' s ==> (!t. 'h4/const/pred_set/FINITE' t ==> 'h4/const/arithmetic/+' ('h4/const/pred_set/CARD' ('h4/const/pred_set/UNION' s t)) ('h4/const/pred_set/CARD' ('h4/const/pred_set/INTER' s t)) = 'h4/const/arithmetic/+' ('h4/const/pred_set/CARD' s) ('h4/const/pred_set/CARD' t))
fof('HL_TRUTH', axiom, p(s(bool,'T'))).
fof('HL_FALSITY', axiom, ~ (p(s(bool,'F')))).
fof('HL_BOOL_CASES', axiom, ![T]: (s(bool,T) = s(bool,'T') | s(bool,T) = s(bool,'F'))).
fof('HL_EXT', axiom, ![V_3f19646,V_3f19642]: ![F, G]: (![X]: s(V_3f19642,happ(s(fun(V_3f19646,V_3f19642),F),s(V_3f19646,X))) = s(V_3f19642,happ(s(fun(V_3f19646,V_3f19642),G),s(V_3f19646,X))) => s(fun(V_3f19646,V_3f19642),F) = s(fun(V_3f19646,V_3f19642),G))).
fof('h4/thm/pred_set/CARD_UNION_', conjecture, ![A]: ![S]: (p(s(bool,'h4/const/pred_set/FINITE'(s(fun(A,bool),S)))) => ![T]: (p(s(bool,'h4/const/pred_set/FINITE'(s(fun(A,bool),T)))) => s('h4/type/num/num','h4/const/arithmetic/+'(s('h4/type/num/num','h4/const/pred_set/CARD'(s(fun(A,bool),'h4/const/pred_set/UNION'(s(fun(A,bool),S),s(fun(A,bool),T))))),s('h4/type/num/num','h4/const/pred_set/CARD'(s(fun(A,bool),'h4/const/pred_set/INTER'(s(fun(A,bool),S),s(fun(A,bool),T))))))) = s('h4/type/num/num','h4/const/arithmetic/+'(s('h4/type/num/num','h4/const/pred_set/CARD'(s(fun(A,bool),S))),s('h4/type/num/num','h4/const/pred_set/CARD'(s(fun(A,bool),T)))))))).
