How far will a blind dog walk into a forest?

“All the way”

This guess assumes the dog continues walking indefinitely into the forest, but the riddle specifies the point at which he is halfway, implying he will then start walking out.

“Not at all”

This guess suggests that the blind dog won't walk into the forest at all, which contradicts the premise of the riddle that asks how far he walks in.

“One mile”

This guess gives a specific distance without considering the riddle's play on words about 'walking into' versus 'walking out of' the forest.