The puzzles needed for the low-effort ending are all like that, but some of the puzzles required for the 100%-completion ending are literally outside the box, requiring you to use tools from multiple discrete puzzle zones together, or to liberate tools from their zones to use in a portion of the level outside the puzzle fences.
Additionally, there are multiple Easter eggs peppering the game that take some amount of subversive reasoning to see or touch.
There's a "solve the puzzle as presented" level of reasoning, and there's a "break the puzzle" level of reasoning. Some puzzles have a "get the tetromino" solution, a "get the star" solution, and a "get somewhere I shouldn't be able to reach" solution.
For instance, have you found the Space Core, from Portal 2, in The Talos Principle?
Additionally, there are multiple Easter eggs peppering the game that take some amount of subversive reasoning to see or touch.
There's a "solve the puzzle as presented" level of reasoning, and there's a "break the puzzle" level of reasoning. Some puzzles have a "get the tetromino" solution, a "get the star" solution, and a "get somewhere I shouldn't be able to reach" solution.
For instance, have you found the Space Core, from Portal 2, in The Talos Principle?