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This paper prompted Liao and her colleagues to investigate whether crows, with their renowned cognitive skills, might possess the capacity for recursion as well.

Even in the academy, fellow polymaths were bedazzled by the breadth of his boundless ruminations into metaphysics, modal logic, recursion theory, identity materialism and the ontological nature of numbers.

Her comedy resembles an infinite recursion, a hall of mirrors in which the reflections rarely flatter.

They are created in a sort of feedback loop, what computer scientists call "recursion."

There is a recursion here that is worth noting: like all proteins, DNA polymerase, the enzyme that enables DNA to replicate, is itself the product of a gene.*