Premise:
"Precious stones glitter in shops on the streets of Mykonos and Santorini, and you can choose as many carats as your budget can handle."
Hypothesis: The stones sold are not authentic.

it is not possible to tell

Premise:
"There are a couple of credible The four-letter word for vagina remains off-limits in polite conversation (although that has more to do with feminism than with profanity), and the slang expression for those who engage in oral sex with males is not yet acceptable by the standards of office-meeting etiquette."
Hypothesis: There's a couple of credible, the four letter word for vagina is off limits in polite conversation, and the slang expression for those who engage in oral sex is not acceptable in the office.

yes

Premise:
"Most regions have their own distinct styles, varying from Kyoto's ornate and highly glazed kiyomizu-yaki to the beautiful natural earthenware of Bizen in Okayama and of Shigarakianear Kyoto."
Hypothesis: Most regions are the exact same as one another and hard to distinguish from each other.
no