Cooperative Zendo

[Unbitwise]

'bcz' ?
'aaaaaabc' ?
'ebbc' ?
'beec' ?
'c' ?
'abcdefghijklm' ?
'nopqrstuvwxyz' ?

[pedromvilar]

'ooaa' ?
'aeiou' ?
'aeiouy' ?
'ae' ?

No, yes, yes, yes

'bcz' ?
'aaaaaabc' ?
'ebbc' ?
'beec' ?
'c' ?
'abcdefghijklm' ?
'nopqrstuvwxyz' ?

Yes, no, no, no, yes, yes, no

My guess is "any string of letters except for ['bee','aac','baa','ebb']."

(I don't expect this is correct but am interested in how it will be proved to be incorrect.)

Kappa's first Koan up there serves as a counterexample.

Koans

---

Yes
bbc
ccb
BBC
Bbc
b
bbcc
{empty string}
abcdefghijklmnopqrstuvwxyz
aeiou
aeiouy
ae
bcz
c
abcdefghijklm

No
bee
aac
baa
ebb
ooaa
aaaaaabc
ebbc
beec
nopqrstuvwxyz

[DanielH]

'qwerty'
's'
'ss'
'ß'
'Fëanor'
'ſucceſsful'
'σειρά'
'חוּט'

[pedromvilar]

'qwerty'
's'
'ss'
'ß'
'Fëanor'
'ſucceſsful'
'σειρά'
'חוּט'

When I said "letters" I meant "English letters," edited the first post to reflect that. 's' and 'ss' are yesses, 'qwerty' and 'Fëanor' are nos.

Koans

---

Yes
bbc
ccb
BBC
Bbc
b
bbcc
{empty string}
abcdefghijklmnopqrstuvwxyz
aeiou
aeiouy
ae
bcz
c
abcdefghijklm
s
ss

No
bee
aac
baa
ebb
ooaa
aaaaaabc
ebbc
beec
nopqrstuvwxyz
qwerty
Fëanor

[Moriwen]

Including my thoughts behind my guesses in a spoilerbox, since people were suggesting sharing them.

thought process

---

An awful lot of the "no"s seem to have doubled letters, but not all. Dunno what's up with that.

The empty string made it, so there's no "must contain" requirement.

The whole alphabet made it, so there's probably no "must not contain" requirement. I'll double-check with capitals.

We've never seen "add one letter" take us from "yes" to "no" or vice versa. I'm gonna try and make that happen.

I'm curious if order matters, so I'm going to check for that

'ABCDEFGHIJKLMNOPQRSTUVWXYZ'?
'aa'?
'be'?
'bcb'?
'cbb'?
'ebe'?
'eeb'?

[Timepoof]

'back'?
'cobweb'?

[DanielH]

Including my thoughts behind my guesses in a spoilerbox, since people were suggesting sharing them.

thought process

---

An awful lot of the "no"s seem to have doubled letters, but not all. Dunno what's up with that.

The empty string made it, so there's no "must contain" requirement.

The whole alphabet made it, so there's probably no "must not contain" requirement. I'll double-check with capitals.

We've never seen "add one letter" take us from "yes" to "no" or vice versa. I'm gonna try and make that happen.

I'm curious if order matters, so I'm going to check for that

'ABCDEFGHIJKLMNOPQRSTUVWXYZ'?
'aa'?
'be'?
'bcb'?
'cbb'?
'ebe'?
'eeb'?

My guess on the first paragraph of your spoilerbox: both initial examples fit that pattern, so a lot of our guesses have..

More guesses, messing around with the first examples:

'bbcbbc'
'beebee'
'bbcbee'
'beebbc'
'bbbece'
'bbebec'
'b'

[pedromvilar]

'ABCDEFGHIJKLMNOPQRSTUVWXYZ'?
'aa'?
'be'?
'bcb'?
'cbb'?
'ebe'?
'eeb'?

Yes, no, no, yes, yes, no, no

'back'?
'cobweb'?

Yes, no

'bbcbbc'
'beebee'
'bbcbee'
'beebbc'
'bbbece'
'bbebec'
'b'

Yes, no, no, no, no, no, repeated yes

Koans

---

Yes
bbc
ccb
BBC
Bbc
b
bbcc
{empty string}
abcdefghijklmnopqrstuvwxyz
aeiou
aeiouy
ae
bcz
c
abcdefghijklm
s
ss
ABCDEFGHIJKLMNOPQRSTUVWXYZ
bcb
cbb
back
bbcbbc

No
bee
aac
baa
ebb
ooaa
aaaaaabc
ebbc
beec
nopqrstuvwxyz
qwerty
Fëanor
aa
be
even
eeb
cobweb
beebee
bbcbee
beebbc
bbbece
bbebec

[Kappa]

'abcdef'
'ghijklm'
'nopqrs'
'tuvwxyz'

[Throne3d]

Is "Fëanor" a 'no' because 'ë' is not an English letter, or actually ruled out because of the rule?