Alicornutopia

Might as well confirm that set...

1.1
1.3
1.6
1.7
1.8
..0
..1
..2
..3

That’s twice in a row you’ve only listed nine things instead of ten, so I’ll throw in ..5 for free (since I expect it’s the next you’d ask for).

The first five are yes, the rest are no.

..
....
.....
......
00
000
0000
00000
000000

1.41421..
1.41421.
1.41421
1.4142
1.414
1.41

Both of you: all no

For the sake of the counterexample, I hereby guess that the rule is: "1." followed by any single allowed character

The rule does not dislike all (representations of) irrational numbers; 6.283... is allowed.

Edit: too late to retract this but the empty string is also a counterexample.

111
123
321
..6
..7
..8
..9
..0
6.2
6.3

6.284...
6.285...
..283...
6.283
6.283.
6.283..

Lambda: all no

Unbitwise: yes, yes, no, no, no, no