a = (x && y)

b = (x || y)

c = (x ?? y)

chain1 = (1 && 2 && 3 && FreeVar(global))

chain2 = ((1 && 2 && FreeVar(global)) || 3 || 4)

d = !(x)

e = !(!(x))

resolve1 = (1 && 2 && FreeVar(global) && 3 && 4)

resolve2 = (1 && 2 && 0 && FreeVar(global) && 4)

resolve3 = (FreeVar(global) || true)

resolve4 = (true || FreeVar(global))

resolve5 = (FreeVar(global) && false)

resolve6 = (false && FreeVar(global))

x = true

y = false