How do we differentiate between voluntary and involuntary actions? Do anyone knows the actual intention of others? A police man shot a teenager three times and it was termed "accidental discharge" so it was involuntary.
At KHAN: In your analysis above, you might intentionally leave the hammer in secret collaboration with the servant to hit the child while you are away in order to establish your alibi.
To me, voluntary or involuntary actions depend on innermost intention of individuals.