Premise: You'll stick to your contract with me." "But--" Dave began.

Hypothesis: You have a contract with me.
Answer: yes

Premise: not the largest because the large cranes are very expensive to rent (one size up could double or triple the monthly charges for renting the crane30).

Hypothesis: The company does not have enough money to pay for the extra monthly charges.
Answer: it is not possible to tell

Premise: Unfortunately, the cement used for its construction contained sea sand, which caused the iron reinforcing rods to corrode.

Hypothesis: Sea salt causes iron to become smooth and shiny.
Answer: no

Premise: Finally, the tabs have been wallowing recently in the misery of people you can't remember or never heard of.

Hypothesis: The tabs have been focusing on happy events such as parties and dances and sneaking into them.
Answer: no