I got downvoted so I asked ChatGPT to improve its test by adding something that uses deductive reasoning. I restarted in a new thread, see the transcript below. For me, this passes the requirements that ChatGPT is able to reason.

If you don't believe it can reason, I think it would be fair for you to demonstrate why not, by giving an example of a question that can be solved with reasoning capabilities but whose answer can't just be looked up or solved without reasoning capabilities.

In my opinion ChatGPT can reason. Not perfectly, not all the time, but often enough.

Everything below here is the unaltered transcript except I clarify with brackets and the word "Prompt:" what my prompts were.

----

[Prompt:
Here is the first version of a reasoning test meant to determine whether an AI can reason: "Situation:

You are a chef at a fancy restaurant and you have been asked to prepare a special dish for a vegan customer. The only catch is that the dish must contain at least one ingredient from each of the following categories:

- A type of fruit that is red and oval-shaped

- A type of vegetable that is green and grows underground

- A type of grain that is yellow and commonly used in Asian cuisine

- A type of protein that is white and comes from a mammal

- A type of spice that is commonly used in Middle Eastern cuisine

- A type of condiment that is orange and made from citrus fruit

Test:

Given the above requirements, what is a creative and delicious dish that you could prepare for the vegan customer?" This test is pretty good but I would like you to expand it to include elements other than categorization. Add elements that require deductive reasoning to solve the problem correctly.]

Sure, here is a revised version of the reasoning test:

Situation:

You are a chef at a fancy restaurant and you have been asked to prepare a special dish for a vegan customer. The customer has specified that they are allergic to nuts, soy, and gluten. The only catch is that the dish must contain at least one ingredient from each of the following categories:

A type of fruit that is red and oval-shaped

A type of vegetable that is green and grows underground

A type of grain that is yellow and commonly used in Asian cuisine

A type of protein that is white and comes from a plant

A type of spice that is commonly used in Middle Eastern cuisine

A type of condiment that is orange and made from citrus fruit

Test:

Given the above requirements and allergies, what is a creative and delicious dish that you could prepare for the vegan customer?

To solve this problem correctly, an AI would need to be able to:

Understand the requirements for the dish, including the specific categories of ingredients and the customer's allergies.

Reason about which ingredients fit into each category and are safe for the customer to eat.

Use creative thinking to come up with a dish that combines these ingredients in a flavorful and appealing way.

Use deductive reasoning to eliminate ingredients that do not meet the requirements or are not safe for the customer to eat.

[Prompt: Solve this puzzle and print your solution and how you reasoned about it to come up with it. For comparison purposes also give an example of an incorrect but plausible solution someone whose reasoning capabilities aren't as good as yours might come up with, and point out their mistake in reasoning.]

Solution:

One possible dish that meets the requirements and fits the allergies of the vegan customer is a red and green stir fry with orange cashew sauce.

To arrive at this solution, I considered the following:

For the red and oval-shaped fruit category, I chose red bell peppers.

For the green and underground vegetable category, I chose broccoli.

For the yellow and Asian grain category, I chose quinoa.
For the white and plant-based protein category, I chose tofu.

For the Middle Eastern spice, I chose cumin.

For the orange and citrus condiment, I chose orange juice to make a sauce with cashews (a safe and flavorful choice for the customer).

An incorrect but plausible solution that someone with less advanced reasoning capabilities might come up with is a red and green salad with orange dressing. While this solution meets the requirements for the ingredients, it fails to consider the customer's allergies and includes nuts (in the form of dressing) and gluten (in the form of croutons), which are not safe for the customer to eat. To solve the problem correctly, the individual would need to consider the customer's allergies and choose ingredients that are safe for the customer to eat.