Assuming they had all out fights.
Yes. It was basically proven. Kaido sensed it. Or do you think Kaido is retarded and can't tell the difference.
No proof
Oda never said you need COc to scar/hurt kaido
Nice try.
You need ryuo to hurt Kaido if you lack internal attacks or hax or enough power.
Retainers issue was AP not CoC or haki.
Kaido never said " you couldn't reopen it cause your haki sucks or you lack CoC"
Headcanons
Kaido isn't retarded.
This arc:
Kaido has always wondered --> tconfirmed ---> made comparisons
Whenever something seems odd. Whenever he felt haki or was hurt (Enma, CoA or CoC or adCoC)
Oda also won't have Zoro's CoC /new skill moment be lackluster...not have visuals.
If Ussop can be shown clearly using CoO then Zoro will get even better visuals not just a mere question which he himself denies of having/using CoC.
Right now...Oda stopped kaido at wondering points
So far in this arc :
- Brook wondered if Zoro used CoC ---> zoro denies
- Kaido wonders if Zoro used CoC/has CoC --> Zoro denies
In both cases :
- we don't see visuals of CoC emitting from Zoro before or when he attacked/talks!
- we see Brook mistook The earthquake came from Zoro screaming madly!
- Which might mean Kaido also mistook Zoro's intiimidating spirit being CoC!
Be patient...Oda would make it clear
Will have Zoro use COc on panels clearly with visuals if he truly has CoC!
And if he does adCOc...it would be shown clearly like how luffy/kaido are looking.