Premise:
"Each topical section will be identified by an alpha-numeric code (for example, P10 for Pensions), with numbers selected to allow addition of future topics."
Hypothesis: The sections will each have a four digit number assigned for identification.

no

Premise:
"On of the best times to see the square's architecture is in the winter, when the chestnut trees are bare and don't obscure the pink brick and honey-colored stone faaades."
Hypothesis: In the winter, when the chestnut trees are bare and don't obscure the pink brick and honey-colored stone facades--that is one of the best times to see the square's architecture.

yes

Premise:
"A small purple despatch-case, with a key in the lock, on the writing-table, engaged his attention for some time. "
Hypothesis: He ignored the purple case.
no