In DnD4e essentials you have a choice of 3 arrays. However in the rules compendium they mention a point buy system.
I know from previous versions of the character builder that it will not allow you to have more than 1 stat below 8. However, an argument came up as to whether this is RAW. (Rules as Written)
After much pondering and arguing with my friend, I suggested that since the rules state you start with an 8,10,10,10,10,10 and 22 points. and you then improve the scores, I argued this means that you can't subtract from these numbers. My friend was unconvinced, and argued that improving one of my stats involves making the others worse.
I also argued that the table for the point costs doesn't display -1 or -2 for the values of 9 and 8, which it would if you could actually do that. Again, my friend was not convinced arguing that listing such a cost would just be confusing in the table, but it was obviously implied by the cost of values that start at 8.
Are there any other clear rules on this? Who do you believe has the correct reading here and why?