As a non-AI Learning Model, I cannot conclude one way or the other with any certainty. What I can say is that ChatGPT responses tend to follow a similar pattern:

• Consistent and clear responses: ChatGPT will often respond to prompts with very readable, well-formatted bulleted lists
• Socratic reasoning: Items in those lists will have a logical structure from beginning to end

Finally, ChatGPT responses tend to end those lists with a summarizing statement that restates the previous ideas - that ChatGPT will often respond in lists, use a formal and logical writing style, and end with a concise summary of the previous statements.

If you did write it, my apologies then. Take my comment as a compliment