Logic Puzzle Forums Question about Either clues
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#1
12-02-2016, 09:50 AM
 springrate Junior Member Join Date: Sep 2016 Posts: 1

Okay, so we have this situation.

Clue #3 says "the Annata Branco is either the merlot or the 1992 bottle." Okay. Given what we have so far, the only way the Annata Branco can be the merlot is if the merlot is from 1984.

Therefore my question, with this information, does this mean that the 1984 is ALWAYS the merlot? Because otherwise the clue would be impossible? Or if the Annata Branco is 1992, does the Merlot become irrelevant to the clue and it can be either 1984 or 1988?

Hopefully that makes sense - I'm wondering if clue #3 definitively states that the merlot is from 1984, regardless of it being the Annata Branco or not.

Maybe an example would be - if the Annata Branco is 1992, can the Merlot be 1988 because the clue does say "either"? Or is the clue telling me that the Merlot has to be 1984 since that's the only way it could also be the Annata Branco?

Last edited by springrate; 12-02-2016 at 09:52 AM.
#2
12-02-2016, 10:03 AM
 SamanthaJoy Junior Member Join Date: Jun 2009 Posts: 10

It absolutely does NOT mean that the merlot is necessarily from 1984.

The only positive thing we can be sure of, that you don't already have recorded, is that the Annata Branco cannot be the gewurztraminer.
#3
12-05-2016, 03:23 PM
 Lacewing Junior Member Join Date: Dec 2015 Posts: 2

This type of clue, A is either B or C, does not tell us anything about A, only that B and C do not go together. There may be another clue that discusses B and shows you that B is boat A, or the same with C. Or, there may be an additional clue that puts A again with B or C.

X out B with C (year with merlot) and move on.
#4
01-27-2017, 12:52 PM
 Orion13 Junior Member Join Date: Jan 2017 Posts: 3

Actually it can tell us quite a bit more than the previous poster admits.
One of the confusions I see in the OP is how to literally read: A is either B or C. The more wordy and precise way is that the object with attribute A is either ALSO the object with attribute B or else it's the object with attribute C. As the previous poster indicates, since the object with Attribute A can't be associated with BOTH attributes B and C it is safe to "X out" where B and C intersect on the grid. B and C are two distinct items in our solution only one of which pairs with A. It does not tell you what B is, only that it isn't C.

But we're not done. Once we find out other attributes of the objects involving A, B or C, it is possible for this clue to inform us further. If in the OP we have deduced from other clues, for example, that the Annata Branco is from 1984 THEN IT MUST be the merlot based on Clue #3, since it has to be EITHER the merlot OR the 1992 and we have deduced it is not the 1992.

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