set A = 1Cat (0,{0});
reconsider C = 1Cat ((1Cat (0,{0})),[[(1Cat (0,{0})),(1Cat (0,{0}))],(id (1Cat (0,{0})))]) as strict Categorial Category by Th11;
take
C
; C is full
let a, b be Category; CAT_5:def 8 ( a is Object of C & b is Object of C implies for F being Functor of a,b holds [[a,b],F] is Morphism of C )
assume that
A1:
a is Object of C
and
A2:
b is Object of C
; for F being Functor of a,b holds [[a,b],F] is Morphism of C
let F be Functor of a,b; [[a,b],F] is Morphism of C
A3:
a = 1Cat (0,{0})
by A1, TARSKI:def 1;
A4:
b = 1Cat (0,{0})
by A2, TARSKI:def 1;
then
id (1Cat (0,{0})) = F
by A3, FUNCT_2:51;
hence
[[a,b],F] is Morphism of C
by A3, A4, TARSKI:def 1; verum