----
0 instanceof a;
!(1 instanceof a);
!!(2 instanceof a);
!!!(3 instanceof a);
if(a instanceof b) 4;
if(!(a instanceof b)) 5;
!(6 instanceof a) || b;
(!(7 instanceof a)) + b;
if(!(a instanceof b) || c) 8;
if(!(a instanceof b) + c) 9;
----
0 instanceof a
(1 not instanceof a)
!!(2 instanceof a)
(3 not instanceof a)
4  if a instanceof b
5  unless a instanceof b
(6 not instanceof a) or b
(7 not instanceof a) + b
8  if (a not instanceof b) or c
9  if (a not instanceof b) + c
