For instance, Rutan's Solitaire and Steve Wright's Stagger-EZ. What are the benefits of having dihedral on the canard?
It seems like canard dihedral increases yaw instability, and requires a bigger vertical stabilizing surface. Yet there are flying GA airplanes and sailplanes using canards with dihedral, and they've surely thought of this. What's the reason for that?
(My opinion-based hypothesis is that it's about very stalled AoA behaviour, where canard dihedral may naturally slow down some flat spin, and help with recovering from it; still, I cannot find any references about this, and it may also be a very wrong statement as long as it's opinion-based.)