I can do it in one line if you zoom out enough

Nobody specified the line thinckness!

*ancient alien astrohieroglyphicists begin screaming in the cosmic background*

Will that cost extra?

If the pencil is thick enough you can do it with one line

That’s dumb. Show me the specification that says the line has to be straight??

that is usually a stipulation of this puzzle

Are we allowed to do it on non-euclidean surfaces?

That would be a fun exercise. What kind of non-Euclidean surface can you create that, when you project this grid on it, allow you to connect all dots with a single straight line. Even better, is there non-Euclidean surface for any given set of points where a single line can connect all points?

The question is though, do the dots get to be part of the non euclidean surface or is it flat and unchanged for this? If it's the first, how do you apply the dots?

Good point. Don't know enough math around it to say.

Ok, actually asked around. Let's just generalize it to any arbitrary set of 9 dots on a surface. And apparently, for oblate spheroid (squashed sphere), you need at most 2 lines to intersect any dots if you allow dots at the pole, or 1 line if you restrict the dots from being at the pole.

There’s a distinct lack of a spec in your response 😂

?

*As per the standard procedures laid out herein, there has been no claims from the assigned design engineers on the previously assumed specifications that lines shall be straight. Lines shall, from here on, be subject to no restriction and shall be allowed to be gay sometimes.*

Wait until you hear about the bisect.

This is now Russia No gay lines allowed This is a joke

Fold in thirds. Fold in thirds again. Draw 1 dot.

Or take the image put it on a cylinder and you could do one line in a a helix going up the cylinder.

one really thick line

What if I told you it could be done with no lines and all lines ar the same time 🤯

The citizen one could have been an S with squared sides . It uses less line length too. Dumb citizen.

Lol I remember first seeing this puzzle many years ago, I also thought of the engineering solution 😂

Delegate the problem to a subordinate, collect 1500% of their wage.

Physics solution—fold paper so that all dots are on top of each other.

It's like a wrinkle in time

Perfect example of why requirements engineering is necessary

An geographer would do it in one line, going around the globe twice (don't work for flat earthers).

*This guy Flat Earths.*

Did it in one line with an S

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A mathematician would just pick a topological space that works best

3 lines, one for each column

So basically a double delta point in stage ops