Premise:
"Although the warm, clear waters of the Aegean constitute a near-perfect diving environment, until recently the Greek government was rightly concerned about the possible damage divers might do to submerged ancient sites, and diving was prohibited."
Hypothesis: The Greek government isn't worried about underwater sites at all, not caring if they are damaged.

no

Premise:
"oh oh yeah well i i i would i mean you know they've got them out here because it's you know they don't actually know what Mexican you know what Mexican food is here"
Hypothesis: They don't have any Mexican options.

no

Premise:
"It happened in the late 1960s, when state and local officials embarked on a campaign to encourage welfare and food-stamp use--to remove stigma and boost participation rates."
Hypothesis: State and local officials began a campaign to encourage welfare use in the late 1960s.
yes