1`Say' echos its argument. Its return value is of no interest.
2`Truth' echos its argument and returns a TRUE result.
3`False' echos its argument and returns a FALSE result.
4
5  Truth 1 && Truth 2   || Say 3   output=12
6( Truth 1 && Truth 2 ) || Say 3   output=12
7
8  Truth 1 && False 2   || Say 3   output=123
9( Truth 1 && False 2 ) || Say 3   output=123
10
11  False 1 && Truth 2   || Say 3   output=13
12( False 1 && Truth 2 ) || Say 3   output=13
13
14  False 1 && False 2   || Say 3   output=13
15( False 1 && False 2 ) || Say 3   output=13
16
17Truth 1 ||   Truth 2 && Say 3     output=13
18Truth 1 || ( Truth 2 && Say 3 )   output=1
19
20Truth 1 ||   False 2 && Say 3     output=13
21Truth 1 || ( False 2 && Say 3 )   output=1
22
23False 1 ||   Truth 2 && Say 3     output=123
24False 1 || ( Truth 2 && Say 3 )   output=123
25
26False 1 ||   False 2 && Say 3     output=12
27False 1 || ( False 2 && Say 3 )   output=12
28
29