Conundra

1992, Steve Chan and Cal Clark, Flexibility, Foresight, and Fortuna in Taiwan's Development, Routledge, →ISBN, page 11, We present below the major policy paradoxes or conundra indicated by such research and theorizing.

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A woman at U. Cal–Irvine had earned tenure with an essay arguing that the reason-versus-no-reason debate about what was unentertaining in Himself's work illuminated the central conundra of millennial après-garde film, […]

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Indeed, in the Cartesian view, the inability to draw an appropriate connection between the mental and the physical results in both metaphysical and epistemological conundra: the mind-body problem, the problem of knowledge of the external world, and the problem of other minds.

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Rey is worried about conundra involving epiphenomenalism, zombies and such, and to avoid them he wants to reduce phenomenal consciousness to the computational.

Source: wiktionary