Premise: They can.

Hypothesis: They won't do it.
Answer: it is not possible to tell

Premise: What there is in the way of stylized leaps, spins, and balancing on the toes comes out as the natural expression of exceptionally graceful human beings and not as a demonstration of what some clever windup toys can do.

Hypothesis: It takes years of practice to be able to balance on toes.
Answer: it is not possible to tell

Premise: The spectacular cloister is a superb example of mostly late-Gothic style, with elaborate stone carvings.

Hypothesis: The cloister features intricate stone carvings.
Answer: yes

Premise: They would not want to leave and the river spikes would not be enough.

Hypothesis: The river spikes would not be enough.
Answer: yes