Statement: A man must be wise to be a good wrangler. Good wranglers are talkative and boring.
Conclusions:
I. All the wise-persons are boring.
II. All the wise-persons are good wranglers.
Neither I nor II follows
According to the statement, good wranglers are wise-men. But it does not mean that all wise-men are good wranglers. So, neither I nor II follows.