It comes from erasing all those math problems when you realize you did them wrong.
Not just math. According to my mom, when I was 6 and learning to write I was entirely dissatisfied with my formation of a capital B. I erased it so often I wore through the page (which was a school book) and then sulked under the dining room table for an afternoon. My Bs are better (especially with a keyboard), but I often wish I could retreat to my happy place.
OK, here's a question from my daughter's homework:
You buy a pack of 12 pencils at the store. How much did you likely pay?
a)$2.25 b)$10.25 c)$0.10
Her first answer: b). I'm sure the desired answer was a), but the last time I bought a dozen pencils from Staples, they cost ~$12 -- and they didn't even have erasers! (OK, it was a graded set of Steadtler pencils from 6B to 4H, Made In Germany)
BTW, the super-cheap pencils aren't worth it; the wood is so crappy, every time I sharpen them it uses about half the pencil to get a good point.
Intel has had some really unusal products in their past that never took off, inclinding a intelligent display controller. It displayed text only, but supported advanced features such as linked lists. Unusual, but about as successful as Intel's first 32-bit CPU, the iAPX432.
@antedeluvian, thanks for the tip on Math Input Panel. It could be useful when I need a nequation for an article.According to Microsoft's instructions, you type "amth Input Panel into the search and it will give find it for you.
I tried following the instructions but instead, Windows wanted to shut down. Fortunately, I could canel the process.
These have huge erases; I just got one for my niece since she went through 10 erasers in two weeks on her Kuro Toga. BTW, the Kuro Toga Roulette is the best mechanical pencil; it's metal, and rotates the lead every time you advance. I have the gunmetal version; I only wish Uni would make it in 0.3mm.
Most of the time, I prefer using pens, but I've been using pencils more after I got my Roulette and a Pentel GraphGear 1000. Another intesting option is Pilot's Frixion erasable pens; they actually work well, much better than the PaperMates of the late 1970's.