I am outRAAAAAGED.

Deadline is now 6:40 am.

Actually, it is, but you have to think outside the box.

Nope. Not given the requirements I gave:

1) Never picking up the pencil (or whatever), but draw straight lines (a change in straightness constitutes a new 'line')
2) the points are dimensionless, the lines are single dimension
3) the points are on a Euclidean plane that cannot be manipulated

Do tell, how that would be possible?

9 dots on a square, 3 perfectly straight lines can cover all of them, even with the points being on a single unbendable euclidean plane. Why? Because you missed the "don't raise your writing utensil" part ;)

I use a marker instead of pencil, you probably wouldn't think of pencil in this way. Does that help?

scumpatriots working together?!!!!!! *jokes*

dooodooodooooo

I did not.

A single dimension marker wouldn't change the results at all.

Read the post I quoted. Read the post you quoted in the post I quoted. No "no raising" :)

It would if it was a REALLY thick marker. :)

I said "never picking up". So, unless you wish to interpret it as did dreamler7 (still the best answer), it means the same thing.

Single dimensional items have thickness? :P

dootdoooo

Deadline is 6:35 am 19 hours from now.

I'll be out for 3-5 hours this afternoon, just fyi. Family easter gathering then driving back north.

doooooooooooo

Missed the single part. :-O

Yes, a single dimension utensil is impossible.

doooooodoooooo

zipzip!