Premise:
"We heard a lot of good ideas from people who've been contributing for many years to pro bono service, said Mr. Curnin. "
Hypothesis: Throughout all the years, we never heard a single useful idea from the people who contributed.

no

Premise:
"Once the development is taken over, it's very difficult to take them back."
Hypothesis: It is easy to correct a power grab of development.

no

Premise:
" Santa Euleria was the first village in Ibiza to attract foreign visitors decades before the invention of the package tour and a significant (and in some cases notorious) colony of foreign artists and writers has grown up here, scattered around the local area."
Hypothesis: The colony of foreign artists in the village had a few famous names.
it is not possible to tell