Useful links

Author

Marcel Turcotte

Published

September 8, 2026

Datasets

Here is a list of websites with datasets relevant to class concepts, enhancing your skills and intuition in data analysis.

Small-to-medium datasets, very student-friendly

Larger datasets

Competition(s)

Jobs

Podcasts

AI for Good

Ethics

Hype

Popularization

Science

Professional societies

Conferences

Journals

Fun

Note 2025-06-26

User: Julia has two sisters and one brother. How many sisters does her brother Martin have?

ChatGPT-4o: Martin has two sisters.

Since Julia is one of the two sisters, and Martin is her brother, the other sister is also Martin’s sister. So, Martin has two sisters.

ChatGPT-o3: Martin has two sisters —Julia and the other sister mentioned in the statement.

ChatGPT-o4-mini-high: Martin has three sisters: Julia plus her two other sisters.

Reasoning: Julia has two sisters and one brother, named Martin. So, there are four children in total: Julia, her two sisters, and her brother Martin. Since Martin is her only brother, and he has three sisters: Julia and her two sisters. The answer is three. Previous responses saying Martin has two sisters were wrong — there are actually three sisters.

Surprisingly, Open AI o3 produces the wrong answer. Similar results were produced, at the time of writing, using Google Gemini 2.5 Flash and Pro.

Note 2025-09-02

User: Julia has two sisters and one brother. How many sisters does her brother Martin have?

ChatGPT 5: Three.

If Julia has 2 sisters and 1 brother (Martin), the children are {Julia, Sister₁, Sister₂, Martin}. Martin’s sisters = {Julia, Sister₁, Sister₂} ⇒ 3.

Note GPT 4o 2024-09-24

user: How many “t”s are there in “Turcotte”?

ai: There are two “t’s in the word”Turcotte”.

user: Are you sure?

ai: Yes, I am sure. The word “Turcotte” contains two “t”s.

user: What are the letters at positions 1, 6, and 7 of “Turcotte”, with 1-base indexing?

ai: Using 1-base indexing, the letters at positions 1, 6, and 7 of “Turcotte” are:

  1. Position 1: T
  2. Position 6: t
  3. Position 7: t

user: Based on this, how many “t”s are there?

ai: Based on the positions you provided, it appears there are three “t”s in “Turcotte”. I apologize for the earlier mistake.

user: How many “t”’s are there in Turcotte?

ai: There are three “t”s in the word “Turcotte”.

Note ChatGPT 4 2024-02-18

Me: Create a picture of an empty room with no elephant in it. Absolutely no elephant anywhere in the room.

ChatGPT

An empty room with no elephant in it.
Figure 1

Here’s the illustration of an empty room with no elephant in it. The room is completely empty, emphasizing the lack of contents and any animals.

Me: Hum, describe the image that you have just generated.

ChatGPT: The image depicts an empty room characterized by bare walls and a wooden floor. The room is brightly lit, enhancing its sense of space and emptiness. There are no furniture pieces or objects present, ensuring the room appears unoccupied. Notably, there is no elephant or any other animal within the room, strictly adhering to the request for an environment devoid of any such elements. The perspective of the image reinforces the openness and emptiness of the room, emphasizing the complete absence of contents.

Me: What is in the right corner of the room?

ChatGPT: In the image generated, the right corner of the room appears empty, consistent with the overall description of an unoccupied and bare space. There are no objects, furniture, or decorations in that corner, aligning with the room’s depiction as entirely empty.