Doubt about validity of solution


#1
  1. farmer takes cabbage.
  2. farmer comes back alone
  3. farmer takes wolf.
  4. farmer comes back alone
  5. farmer takes goat.

Completed in 5 trips


#2

You’ve just left the she-goat in the clutches of an unsupervised wolf!


#3
  1. Take the goat.
  2. Come back alone.
  3. Take the cabbage.
  4. Come back with the goat.
  5. Take the wolf.
  6. Come back alone.
  7. Take the goat again.