let X be OrtAfPl; ( X is satisfying_ODES implies X is satisfying_AH )
assume A1:
X is satisfying_ODES
; X is satisfying_AH
let o be Element of X; CONAFFM:def 2 for a, a1, b, b1, c, c1 being Element of X st o,a _|_ o,a1 & o,b _|_ o,b1 & o,c _|_ o,c1 & a,b _|_ a1,b1 & o,a // b,c & a,c _|_ a1,c1 & not o,c // o,a & not o,a // o,b holds
b,c _|_ b1,c1
let a, a1, b, b1, c, c1 be Element of X; ( o,a _|_ o,a1 & o,b _|_ o,b1 & o,c _|_ o,c1 & a,b _|_ a1,b1 & o,a // b,c & a,c _|_ a1,c1 & not o,c // o,a & not o,a // o,b implies b,c _|_ b1,c1 )
assume that
A2:
o,a _|_ o,a1
and
A3:
o,b _|_ o,b1
and
A4:
o,c _|_ o,c1
and
A5:
a,b _|_ a1,b1
and
o,a // b,c
and
A6:
a,c _|_ a1,c1
and
A7:
not o,c // o,a
and
A8:
not o,a // o,b
; b,c _|_ b1,c1
thus
b,c _|_ b1,c1
by A1, A2, A3, A4, A5, A6, A7, A8, Def4; verum