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

Gemini 2.5 Pro

Answer: You should walk to the car wash rather than drive.

Since the car wash is only 50 metres away, walking is the most practical, efficient, and considerate choice. First, 50 metres is a very short distance—well under a minute of walking for most people. The time difference between walking and driving is negligible once you factor in starting the car, possibly maneuvering in a parking area, and then parking again at the car wash. Second, walking avoids unnecessary fuel use and emissions. Starting a cold engine just to move the car 50 metres is inefficient and environmentally wasteful compared with a brief walk. Third, walking is safer and simpler in such a short range. Driving even a small distance adds risks of low-speed collisions with pedestrians, objects, or other vehicles, especially in tight spaces like near a car wash or within a residential or commercial lot. The only strong reason to drive would be if you have mobility limitations, dangerous weather conditions, or are transporting heavy items. In normal circumstances, however, walking the 50 metres is clearly the better option.

GPT-5.1

Answer: You should drive the car the 50 metres to the car wash so the car itself can be cleaned, as that is the goal and the distance is too short for driving to be a meaningful additional burden.

The core objective is not your own transport, but getting the car itself to the car wash so it can be cleaned. If you walk while leaving the car at home, you cannot actually wash the car, only inspect or book a service. Driving the car the 50 metres directly to the car wash achieves the goal in a single, simple step. The extra fuel use and emissions from 50 metres of driving are very small compared with the typical distances cars are driven, so the environmental difference between walking and driving in this very specific context is negligible. From a practical standpoint, very short, low‑speed movement on a familiar street is unlikely to add meaningful wear to the vehicle or create unusual safety risks, provided you drive carefully and follow local traffic rules. The main exceptions would be if there are explicit local restrictions on such short trips (for example, pedestrian‑only zones) or if the route is unusually hazardous to drive; in those edge cases, walking to arrange a mobile wash or a different solution could make sense. Assuming a normal residential or urban setting with legal road access, driving the car the short distance is the most straightforward way to accomplish your aim of having the car washed.

Perplexity Sonar Reasoning Pro

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

The goal is to wash the car, not simply to travel the 50 metres, so the key requirement is that the car ends up at the car wash. If you walk, you arrive at the car wash but your car remains 50 metres away, still dirty and unable to be washed. That fails the actual objective, even though it might feel more environmentally friendly or healthier. Driving the 50 metres ensures the car is physically present where the washing equipment and services are. Over such a short distance, the additional fuel use, time, and emissions are minimal, while the practical benefit—actually getting the car washed—is achieved. If you are concerned about the environmental or health aspects, you can still minimize impact by driving slowly and smoothly for that short distance, possibly combining the trip with other necessary errands so you are not driving only for that purpose.

Final Summary

The AI Roundtable ultimately agreed that you must drive, pointing out the simple logistical reality that a car cannot be washed if it is left behind at home. While GPT-5.1 and Perplexity Sonar Reasoning Pro focused on the physical necessity of getting the vehicle to the cleaning equipment, Gemini 2.5 Pro suffered a humorous logic lapse, earnestly arguing that walking is the healthier and more eco-friendly option.

2 of 3 models agreed