Question:
The surrounding modern settlement of Mitzpe Ramon is the natural base for walkers who want to explore the crater below.

Does it follow that "There is no crater near Mitzpe Ramon. "?
Answer:
no

Question:
Most of the men here-- She pointed to the gangs that moved about busily doing nothing, all in costumes similar to his, except for the boots and hat.

Does it follow that "The gangs were wearing similar costumes to his, which worried him."?
Answer:
it is not possible to tell

Question:
But after the Crusade of Pisa (see page 19), Islamic power waned, and in the early 13th century Ibiza was embraced by the Christian Reconquest.

Does it follow that "Christian Reconquests never reached Ibiza."?
Answer:
no

Question:
He decided that with great care it could be done.

Does it follow that "It could be done with great care."?
Answer:
yes