Eventually, you will find the empty set.

random

Upon the whole, the tribe inhabiting Penn Cove are more advanced than any others in civilization. Charles Wilkes, U.S. Exploring Expedition 1841

Empty set (Wikipedia) In mathematics, the empty set is the unique set having no elements; its size or cardinality (count of elements in a set) is zero. Some axiomatic set theories ensure that the empty set exists by including an axiom of empty set, while in other theories, its existence can be deduced. Many possible properties of sets are vacuously true for the empty set.