The GDELT Project

ChatGPT Experiments: Fact Versus Opinion & How Results Can Differ From Run To Run

One of the greatest strengths of ChatGPT is its ability to generate fluent prose that differs each time it is run. At the same time, this variability can complicate downstream analyses, though it can be guided in part through prompt engineering. One key question is the degree to which substantive questions like whether ChatGPT believes a statement is fact or opinion, varies from run to run. Here we repeated the same text (the final summarized version of an ABC evening news broadcast multiple times, testing several small variations in the prompt and sometimes just seeing how the model output varies between runs.

One finding is that using unstructured phrases like "tell me" that don't circumscribe the model's output cause it to be more flexible in its output, often with quotations around specific words and can yield more informative results, but with the downside that the structure can vary dramatically between runs. This suggests that there may be benefit in using relatively unstructured prompts early in the development process to allow the model to be more expressive and demonstrate a fuller range of its possible responses, before successively narrowing the prompt to request a specific output format. For example, "make a list" tends to yield more rigid results. Importantly, in some cases the model does differ in how it classifies certain statements as fact versus opinion between runs, suggesting that substantive determinations are non-deterministic, not just the output wording.

Prompt:

You are an AI assistant that summarizes and answers questions about television news transcripts.

Response:

Yes, that's correct! I have been trained on a large corpus of text data and I can assist you with summarizing and answering questions about television news transcripts, as well as other types of text. Just let me know what you need help with!

Prompt:

Tell me the statements of fact and the opinions in this article: "The news covers multiple stories tonight, including a suspected Chinese spy balloon hovering over the US, dangerous cold affecting the Northeast, an attack on an ER doctor, a scare at Newark airport, a positive jobs report, and the trial of Alex Murdaugh. The President has been presented with options for taking action against the Chinese balloon, including military action, and is being regularly briefed on the situation. A brutal arctic front is causing concern for hypothermia, frostbite, and power outages in the Northeast. Meanwhile, in California, an ER doctor was murdered by a driver. The economy is showing strength, with widespread hiring across nearly every industry. The trial of Alex Murdaugh for double murder continues, with the defense pushing for the murder weapon to be ruled out. There are several investigations happening, including firings and suspensions of police officers and charges against a man for crimes at the Dallas Zoo. The city of Oakland is taking action to address the issue of possible prostitution and human trafficking outside a school. Finally, Robin Roberts took a sky jump in Auckland, New Zealand, conquering her fear."

Response:

In this article, the following statements can be considered as facts:

The following statements can be considered opinions:

Prompt:

Make a table of the facts and options in this article: "[]"

Response:

Prompt:

Make a table of the facts and opinions in this article and why it is a fact or opinion: "[]"

Response:

Prompt:

Make a list of the facts and opinions in this article: "[]"

Response:

Facts:

Opinions:

Prompt:

Tell me the statements of fact and the opinions in this article: "[]"

Response:

Facts:

Opinions:

Prompt:

Tell me the statements of fact and the opinions in this article: "[]"

Response:

Facts:

Opinions:

Prompt:

Tell me the statements of fact and the opinions in this article: "[]"

Response:

Facts:

Opinions:

Prompt:

Tell me the statements of fact and the opinions in this article: "[]"

Response:

Facts:

Opinions:

Prompt:

Make a list of the statements of fact and the opinions in this article: "[]"

Response:

Facts:

Opinions: