# Not Just Black and White

Answer for this puzzle is one word. Have fun!

Highlighted parts are where I realised I have clued it wrong... Sorry for all this inconvenience!

Hint:

usefulness level 1

The way of deciphering has been hinted in this post

usefulness level 2

athin should have used another colour instead of yellow. That would make things easier, hopefully...

This puzzle is a part of Ooohh, it all makes sense now! :D

• I am fairly sure I have proved that this is not solvable as an ordinary "just black and white" nonogram. So either that title needs to be taken seriously (though I confess I don't currently have any good ideas what else to do with it), or my reasoning is broken, or (by a long way the least likely of the three options) there's an error in the puzzle. Jun 28 '19 at 2:20
• let me check @GarethMcCaughan Jun 28 '19 at 3:35

After solving the nonogram (from @athin)

The title,

along with the binary found by solving the nonogram, clues Gray codes.

Breaking the code:

We can construct the Gray code by starting with [0, 1], and each layer we can flip the entire list, append 0 to the front of each element in the original list, append 1 to the front of each element in the new list, and then concatenate the lists. So [0, 1] becomes [00, 01, 11, 10] for instance. For 5 bits, we get the list
(Ok, maybe I interpreted the word "flip" too literally).
Anyway, I also wrote down the letters A-Z down the side starting 00000 (which makes sense given our code text contains some 00000's). Decoding the Gray code line by line gives the answer VANADIUM.

• nice job, it's done! when do you want the green check? Jul 6 '19 at 5:33