Materialists often deny and refuse to discuss observed phenomena that defy purely physical explanation, such as chickens returning from afar to their chicken coop at sundown each day and entering the coop in the same order each time, or butterflies migrating thousands of miles each year to the same destination. | Materialists often deny and refuse to discuss observed phenomena that defy purely physical explanation, such as chickens returning from afar to their chicken coop at sundown each day and entering the coop in the same order each time, or butterflies migrating thousands of miles each year to the same destination. |