Question 1043570
1) ~E    --------------hypothesis
2) ~E v ~I -------------addition
3) ~(E•I)  -------------de Morgan's
4) (E • I) v (M •U) ----hypothesis
5) ~(E • I) -> (M •U) --material implication on #4
6) M •U   -----------modus ponens by #3 and #5
7)  M ---------------simplification
8)  ~E • M  ----------conjunction, by #1 and #7
9) ~(E v M) -----------de Morgan's