Premise: Mary Marvel . Created by Otto Binder and Marc Swayze , she first appeared in Captain Marvel Adventures # 18 ( cover-dated Dec. 1942 ) . Wonder Woman . The character first appeared in All Star Comics # 8 in October 1941 and first cover-dated on Sensation Comics # 1 , January 1942 .
Hypothesis: Mary Marvel predates the introduction of Wonder Woman
Label: CONTRADICTION