 
 <prompt> Wetin go happun if two people no dey speak di same language but dem fit understand each other? Given di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: ```The most common, and most purely linguistic, criterion na say if two varieties fit understand each other well well, then dem be dialects of the same language; if not, dem be different languages. But sometimes e fit dey hard to decide if dem be dialects or different languages, especially if dem dey form one kain continuum. For example, if dialect B fit understand both dialect A and dialect C, but dialects A and C no fit understand each other, e go hard to know if A and C na dialects of the same language or not. Sometimes too, e fit happen say person wey dey speak dialect X fit understand person wey dey speak dialect Y, but Y no fit understand X; for dis kind situation, the mutual intelligibility criterion no fit work well.``` 