In general a book should not be used as source material if it is more than four years old. (An exception to this rule might be historical research)

Why is it important to support assertions with relatively current information?

What would you find out about President Clinton's terms of office if you were reading a history text published in 1960?

What would you learn about HIV/AIDS if you had only a science book or scholarly article published in 1970?

It is important to support assertions with relatively current information for a few reasons:

1. Accuracy and validity: New research and information can replace or update older knowledge. By using more recent sources, you can ensure that your assertions are based on the most accurate and up-to-date information available.

2. Evolution and advancements: Many fields, such as technology, medicine, and scientific research, evolve rapidly. Using outdated sources might overlook new discoveries, theories, or advancements in the field. By using current information, you can provide a more comprehensive and accurate account of the subject matter.

3. Relevance and applicability: The world is continuously changing, and societal, economic, and cultural factors can impact the accuracy and applicability of information. By using relatively current sources, you can better understand the context and relevance of your topic, making your assertions more valid and credible.

4. Avoiding misconceptions and outdated views: Older sources may rely on outdated concepts, theories, or understandings that have since been disproven or revised. Using current information helps you avoid using inaccurate or misleading information.

However, it's worth noting that certain areas, like historical research, may require using older sources as primary or foundational material. In such cases, the context and credibility of the source become more important factors to consider when evaluating its usefulness.

It is important to support assertions with relatively current information because the world is constantly changing and evolving. New discoveries, developments, and events can significantly impact our understanding of various subjects.

Using relatively current information allows you to ensure the accuracy and relevance of your assertions. This is particularly important when discussing topics that are time-sensitive, such as scientific research, technological advancements, or current affairs. For example, if you're writing a research paper on climate change, using up-to-date studies and data from reputable sources will provide a more accurate representation of the current state of the environment.

Additionally, using current information demonstrates that you have conducted recent research and have a thorough understanding of the subject matter. It shows that you are actively engaged in the topic and can provide credible and reliable information to support your arguments.

While older books can still be valuable for historical research or when examining long-term trends, they may not reflect the most recent understanding of a topic. Thus, for most subjects, it is generally recommended to rely on more recent sources to ensure the validity and currency of your assertions.