Hi Ashley,
Do you mean why NR isn't the proper representation for the rule? the problem with that, as explained in the text below that block, is that this representation is only partially true. NR in a block formation means that N and R are
always aligned in that manner. That is, that every time you see an N, there is an R after it, and that every time you see an R, there is an N before it. However, that's not the case in this game. The rule is actually focused on R, and that NR block formation is triggered by R. So,
every time you see an R, there must be an N before it. BUT, every time you see an N, there does
not have to be an R behind it. Thus, if you represent the rule just as NR, you are going to start drawing conclusion that are incorrect, and thus we term that a false block. The proper representation, as shown lower on the page, is conditional: R
NR.
Using variables to discuss the rule above can be tricky, so let's use a real world example that might help show why just an NR block isn't correct. Let's imagine there's a rule that says that every time Rex goes to buy a lottery ticket at the store, he finds that Nelida has arrived before him. Does that mean that every time Nelida goes to the store she finds Rex follows her in? No, Rex just keeps seeing her, but there are times she could go to the store and not see Rex. So, NR wouldn't be the right way to show their relationship, because it's when Rex is there that Nelida was there before him. that's R
NR.
Please let me know if that helps. Thanks!
