It means the puzzle was designed to make exactly that mistake tempting.

Did you draw imaginary lines in your head?
Some people solve these puzzles by mentally extending existing lines and checking whether the resulting boundaries create valid squares.
This is a useful problem-solving strategy.
Rather than looking only at what's immediately visible, you are mentally reconstructing the structure.
The Real Challenge: Seeing Beyond the Obvious
The most interesting lesson from the puzzle isn't actually the personality claim.
It's the concept of looking beyond what is immediately obvious.
A complicated visual structure can contain patterns that aren't apparent at first glance.
The same thing happens outside puzzles.
In everyday life, we often focus on the information that is easiest to see.
We notice the immediate problem.
We notice the loudest complaint.
We notice the most obvious explanation.
But sometimes the important information is hidden in the relationship between several smaller pieces.
That's why square-counting puzzles remain popular.
They turn an ordinary-looking collection of lines into a test of observation.
Why Some People See More Squares Than Others
There are several practical reasons people may produce different answers.
One major factor is experience.
Someone who has solved dozens of visual puzzles may already know that the first step is to look for larger combinations.
A person seeing this kind of puzzle for the first time may naturally count the obvious squares and assume the task is finished.
Another factor is systematic counting.
People who approach the puzzle methodically tend to have an advantage.
Instead of randomly searching for squares, they can organize the possibilities by size:
1×1 → 2×2 → 3×3 → 4×4
That dramatically reduces the chance of missing a shape.
A Simple Trick for Solving Square-Counting Puzzles
If you encounter another puzzle like this, don't start counting randomly.
Use a structured method.
Step 1: Find the smallest squares
Count every square that consists of the smallest available unit.
Don't worry about larger shapes yet.
Step 2: Look for squares made from four small squares
These are generally 2×2 squares.
Check every possible starting position.
Step 3: Search for even larger squares
Look for 3×3, 4×4, and so on.
Step 4: Check incomplete lines
This is crucial.
A line that stops halfway may prevent a potential square from existing.
Don't assume that because four corners appear to line up, a square exists.
Step 5: Make sure the shape is actually a square
A rectangle isn't a square.
All four sides must have equal length.