premise: Interstate 29 (I-29) is an Interstate Highway in the Midwestern United States. I-29 runs from Kansas City, Missouri, at a junction with Interstate 35 and Interstate 70, to the Canada–US border near Pembina, North Dakota, where it connects with Manitoba Highway 75.
hypothesis: I29 primarily runs north/south
reason: Interstate numbers are assigned odd numbers when they run N/S, and even numbers when they run E/W. I29 is odd, therefore it must run primarily N/S