  GitHub's Copilot generates code quickly. We investigate whether it generates
good code. Our approach is to identify a set of problems, ask Copilot to
generate solutions, and attempt to formally verify these solutions with Dafny.
Our formal verification is with respect to hand-crafted specifications. We have
carried out this process on 6 problems and succeeded in formally verifying 4 of
the created solutions. We found evidence which corroborates the current
consensus in the literature: Copilot is a powerful tool; however, it should not
be "flying the plane" by itself.
