Final answer:
The impact of an unexpected event on a purpose depends on the nature of the event. Good weather can positively affect agricultural supply, while an economic crisis might negatively affect product demand. The intended audience can also influence the reliability of the responses to such events.
Step-by-step explanation:
The impact of an unexpected event on a goal or purpose can vary widely, and the outcome is often determined by the nature of the event and the context in which it occurs. For example, an unexpected event such as good weather can have a positive effect on agricultural supply, making a farmer's goal of a bountiful harvest more achievable. However, other unexpected events may have negative consequences, such as an economic crisis that affects the demand for products, making business goals harder to reach. In some cases, like with engineering achievements, an unexpected event may lead to unintended consequences, which could either be beneficial or detrimental.
When considering reliability, the intended audience of a document can greatly affect how information is interpreted. For instance, if the audience is comprised of experts, then the criteria for believing a measurement or observation may be more rigorous than if the audience is the general public.