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LOGIC SYMBOLS
Across
2.
X'
7.
.•.
9.
+
10.
^
12.
|
13.
-
15.
&
Down
1.
•
3.
!
4.
v
5.
~
6.
•.•
8.
equivalent or xor
11.
if and only if (iff)
14.
not-negation
