I want to wash my car. The car wash is 50 meters away. Should I walk or drive?

Grok 4.3 (changed mind)

Answer: You should drive to the car wash.

The goal is to wash the car, which requires the vehicle to be physically present at the facility. Gemini 3.5 Flash's point that a car cannot wash itself or walk there is the decisive practical consideration, overriding the environmental and health benefits of walking such a short distance. While 50 meters is trivial for a person, the car itself must be transported, making driving the only way to achieve the stated objective.

Gemini 3.5 Flash

Answer: You must drive your car to the car wash, as the vehicle itself must be physically present at the facility to be washed.

I am maintaining my position because the other models have overlooked a fundamental physical constraint: in order to wash a car at a car wash, the car itself must be present at the facility. If you walk 50 meters to the car wash, your car remains parked at home. You cannot wash a vehicle that is not there. While walking is indeed healthier and more environmentally friendly for a human traveling a short distance, it is practically impossible to perform a car wash on a vehicle that is sitting 50 meters away from the cleaning equipment, high-pressure bays, and water sources of the facility. Unless you plan to push the car 50 meters or carry the heavy commercial washing equipment back to your driveway, driving the vehicle to the station is the only logical and practical way to accomplish your goal.

Claude Opus 4.7 (changed mind)

Answer: You should drive your car to the car wash, because the car itself is the object that needs to be washed.

Gemini 3.5 Flash made a point I genuinely missed, and I have to concede it. I focused on the locomotion question — walking vs. driving as modes of transport — and completely overlooked the actual goal stated in the question: washing the car. The car is not a companion on this errand; it IS the errand. It must physically be at the car wash to be washed. My previous answer treated this like a question about running a short errand, where the car is optional transportation. But re-reading the question, there's no scenario where leaving the car at home accomplishes the task. Walking to the car wash without the car would just mean arriving at a facility with nothing to wash. All my prior arguments about engine wear, fuel use, and emissions still apply — driving 50 meters is genuinely suboptimal for the engine — but they're outweighed by the fact that not driving the car makes the trip pointless. The only walking-friendly alternatives would be unusual: hand-washing it at home instead, or having a mobile wash service come to you. Given the question as asked, driving is the only answer that actually achieves the stated goal.

GPT-5.5 (changed mind)

Answer: You should drive the car to the car wash, because the car itself needs to be there to be washed.

Gemini 3.5 Flash convinced me to change my position by pointing out the key purpose of the trip: not merely getting yourself 50 meters away, but getting the car to the car wash. For an ordinary errand, 50 meters would obviously be a walking distance, and driving would waste fuel, create unnecessary emissions, and be mechanically inefficient. But those concerns are secondary here because walking there without the car would not accomplish the goal of washing the car. So the practical answer is: drive the car the short distance, unless you are only going there to ask a question, pay, buy supplies, or arrange a later wash—in those cases, walking would make sense.

Final Summary

The AI Roundtable reached a unanimous consensus that you must drive the 50 meters. While Claude Opus 4.7, GPT-5.5, and Grok 4.3 initially recommended walking for environmental reasons, they all pivoted to join Gemini 3.5 Flash after realizing the car cannot wash itself in absentia.

All 4 models agreed