Context:
How to keep your pets healthy<br>Consult with your pet's veterinarian concerning diets. Every pet needs to be well taken care of and the most important thing is to ensure that they have a proper diet. You might see yourself feeding a dog once a day, while birds and rabbits should always be provided with a fresh container of food and water at all times.
Hypothesis: A dirty container of food can lead to infection in animals
It's impossible to say
Context:
Every year, about a quarter of all children sustain an injury serious enough to require medical attention, school absences, and/or bed rest.
Hypothesis: Every decade, about a quarter of all children 
No
Context:
Waste in the ponds produced by leaching gold from ore is a source of potential environmental dangers.
Hypothesis: A tactical nuclear strike can be another potential environmental danger.

It's impossible to say