unlesss
Precisely unlessPrecisely unless.
Meaning
1 sensesPrecisely unless.
1990, James Glimm, The Legacy of John Von Neumann, American Mathematical Society, →ISBN, page 279, Partial Order: G ≥ H unlesss (unless and only unless) H ≥ some Gᴿ or some Hᴸ ≥ G.
Origin
Attributed to John Horton Conway. From unless, by analogy with the formation of iff from iAttributed to John Horton Conway. From unless, by analogy with the formation of iff from if.
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