Testing LLMs: Hidden Assumptions and Biases Exposed in Logic Puzzle

LeonidasTMT · reddit · 2026-08-10

A Reddit user tested several mainstream LLMs with a logic puzzle from Instagram and found significant built-in biases and assumptions.

The models tended to read between the lines, fill in unstated assumptions, or simply reproduce the consensus from similar contexts. The author noted that no tested model chose option #4 based on the lack of explicit time restrictions, rejected option #1 for never stating it was free, or noticed that option #2 still required "work."

Original post →

More from Models

Models channel →