; LAYER_STACK · stack two pure truth layers · adjoin kin · not C
; =============================================================================
; NAME     LAYER_STACK
; OP       layer_stack(a,b) → (a|b)|1
; ABI      System V · edi=a · esi=b · → eax
; LAW
;   · co-presence of layers · flat · no rank
;   · C IS LIE · pair is enough · not third pin
; RELATED  adjoin/ · until_grin/ · super_intel/
; IRON
        global  layer_stack
layer_stack:
        mov     eax, edi
        or      eax, esi
        or      eax, 1
        ret