premise: I needed a vehicle . And so I bought a motorcycle . A car would have been a wiser choice . I could have used a car all year and not just half a year , a car would have kept me dry when it was raining and warm when it was cold , a car would have accommodated a great deal of luggage , a car would have protected me . Why would a car have kept me dry when it was raining ?
hypothesis: Because I needed a vehicle .