  With non-perturbative de Sitter gravity and holography in mind, we deduce the
genus expansion of de Sitter Jackiw-Teitelboim (dS JT) gravity. We find that
this simple model of quantum cosmology has an effective string coupling which
is pure imaginary. This imaginary coupling gives rise to alternating signs in
the genus expansion of the dS JT S-matrix, which as a result appears to be
Borel-Le Roy resummable. We explain how dS JT gravity is dual to a formal
matrix integral with, in a sense, a negative number of degrees of freedom.
