Let them ponder on the probability of succeeding with the people.
As I eat my breakfast and smoke my pipe, I ponder over my task.
There was so much time for the Little Girl who should have been a Boy to ponder over it.
He's always in a ponder, ponder, with his mouth open—except when he's grindin' his teeth.
But Asad continued to ponder him with cold eyes, his face inscrutable.