Claim: It would be very hard for humans to reach planets further out in our solar system.
Evidence: First, the distance to these planets is really far. For example, it would take over three years to get to Mars, and even longer for planets like Jupiter or Saturn. This means spending a lot of time in space. Second, humans need food, water, and air to survive. Bringing enough supplies for such a long trip would be very difficult.
Reasoning: Because of the long distances and the need for supplies, planning missions to outer planets is a big challenge. Our current technology might not be able to support such long space journeys safely.