  Recent solar neutrino experiments have shown that both $\phi(^8$B) and the
neutrino flux ratio $\phi(^7$Be)/$\phi(^8$B) are substantially below their
standard solar model values, leading some to discount the possibility of an
astrophysical solution to the solar neutrino puzzle. We test this conclusion
phenomenologically and find that the discrepancies can be significantly reduced
by a distinctive pattern of core mixing on timescales characteristic of $^3$He
equilibration.
