Hi, thanks for the little example.
Ok, at the risk of getting it wrong, i think the following:
Does A = A1?
ANS: As we know that something is in both A and A1, this would mean they both equal the same, as does A = B1, B = A1 and B = B1? As they are all known values?
The reason I answered the above is because im assuming it should be answered based on the
known value within box A and B, but not the rubber duck in box A, compared to the nothing in box B is this wrong?
But, C = A1 and C = B1 cannot equal the same as we dont know if anything is in boxes C and C1?
As for the last one C = C1, im not sure how best to answer it, it does confuse me but, because we don't know if there is something in the box or not, can this equal as correct as they may both contain something, or both be empty? That said one may have something and the other may not? and therefore can be false too.
Am i right in what i right or completely wrong?
Kind regards
MG
Quote:
Originally Posted by gvee
Consider this.
You have 3 boxes, labelled A, B & C.
You take the lid off box A, put a rubber duck in and shut the lid.
You take the lid off box B, don't put anything in and shut the lid.
You do not open box C.
You know the object is in box A, this is your known value, e.g. a string "rubber duck"
You know that box B has nothing in. This too is a known value, e.g. ""
You do not know if box C contains anything at all - it could be full or it could be empty. This value is not known. This is your null
Now imagine we add 3 new boxes in to the equation which have the same set up as before. We will call these A1, B1 & C1 respectively.
Now can you answer these questions?
Does A = A1?
Does A = B1?
Does A = C1?
Does B = A1?
Does B = B1?
Does B = C1?
Does C = A1?
Does C = B1?
Does C = C1?
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