# Or/And/Equivalence

Discussion in 'Computer Science & Culture' started by Spectrum, Jan 31, 2011.

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1. ### SpectrumRegistered Senior Member

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459
Okay, I may have been mistaken with a post I made a few months ago where I stated that an 'AND' operator should have equality either side of the statement. This is false. An OR can be either 0 OR 1 (001 OR 011), but AND can be 0 AND 1 (001 AND 011), in order to produce truth. However EQUIVALENCE (E) should have equality either side.

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This does not make any difference to the following pattern, given that a zero is used to begin with, with equivalence in the middle, followed by a zero:

789
456
123

1=2E4
9=1AND/OR9
8AND/OR6=9
7AND/OR3=(4E8)AND/OR(2E6)

010
010
101

The x and y axis' are equivalence and the z axis is either AND or OR (even though they are opposites they are exactly the same: 1=0OR1, 1=0AND1

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)

Apologies for my mistake but the pattern remains the same, as does the board for my game, whether AND/OR/EQUIVALENCE is used

AND/OR:

001010101
110101010
001010101
110101010
001010101
110101010
001010101
110101010
+01010101

EQUIVALENCE:

101010101
010101010
101010101
010101010
101010101
010101010
101010101
010101010
+01010101

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3. ### James RJust this guy, you know?Staff Member

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36,974
How is anybody supposed to know what you're talking about?

Link to the previous thread. And try to post coherently. It sounds like you're on something.

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5. ### SpectrumRegistered Senior Member

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459
What don't you understand? Either side of the word OR should go opposites, because it's either one OR another. Off OR on. 0 OR 1.

Okay, I'm fundamentally writing (not saying) that 0=1, however this is also true:

0123456789
123456789A

Zero is the first position, 1 is the second position etc. This is also true for our years; 0000 is the first year, 0001 is the second year, hence the twentieth century is the nineteen hundreds.

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7. ### gmilamValued Senior Member

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3,368
Don't have a clue as to what you're talking about - but, there was no year zero. The first century ran from year 1 to 100, second from 101 - 200.... Twentieth centruy ran from 1901 - 2000

8. ### SpectrumRegistered Senior Member

Messages:
459
The opposite of 'OFF' is 'ON'! So, it is 'OFF' OR 'ON'. One OR the other means that the whole statement is true while both sides of an OR are opposites. 0 OR 1=true(1!)
Year zero was the year before one. Why is the twentieth century the nineteen hundreds?

9. ### gmilamValued Senior Member

Messages:
3,368
Ah! - No. OR means as long as either side is true, the statement is true. The two sides may be totally independant of each other.

There was no year zero. Before 1 AD was 1 BC.

The twentieth century was 1901 -2000. (Notice 20 centuries = 2,000 years.)
The twenty-first century began Jan 1, 2001 and will end on Dec 31, 2100.

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Cesspool ?

12. ### James RJust this guy, you know?Staff Member

Messages:
36,974
You're confusing the logical operation OR with what is called XOR or "exclusive OR". There are the relevant truth tables for the operations:

Code:
A B  A OR B  A XOR B
=======================
0 0    0       0
0 1    1       1
1 0    1       1
1 1    1       0

There was no year zero in our current calendar.

Because the first century was the years 1 - 100, the second was 101-200, ..., the 20th century was 1901-2000, and so on.