What happens in diamond problem which lead us to ambiguity?

Question

what makes the ambiguity when we dont inherit the classes virtually?
https://code.sololearn.com/cD7Y0F3o0UZW/?ref=app

Answer 1

https://www.cprogramming.com/tutorial/virtual_inheritance.html

Answer 2

inherit by a non-virtual class make possible diamond problem because compiler dont know which method call (either super class inerith by base class though you dont override they)

Answer 3

you mean the overridden functions??

Answer 4

A code is better than 1000 words :)

https://code.sololearn.com/cK1wVF5rxldO/?ref=app