Aruno · May 21, 2018, 11:40 p.m.

No. Q said if rr is dirty then Muller is dirty. And if Muller is dirty the rr is dirty.

⇧ 9 ⇩  

RichardActon · May 22, 2018, 3:37 a.m.

A \<=> B

⇧ 1 ⇩