As the family is eating pasta, when Lois asks Reese if he wants anymore, the camera is focused on both of them, and his plate is almost empty. However when the camera cuts to just Reese, his plate is full.
Hal tells Dewey that December 7th, 1941 was the opening shot in WW2. Wrong, the war in Europe started September 1, 1939. In the Pacific it started in 1931. Hal should have said WW2 started for the USA on 12/7/41.