Final answer:
Sources 3 and 4 are contestable based on their bias, author's purpose, and level of authority. It is crucial to evaluate these aspects to understand their reliability and validity in research. Differing perspectives from multiple sources help establish a more informed view on the topic.
Step-by-step explanation:
To identify and discuss why Sources 3 and 4 are contestable, one must assess the central idea of each source and its relevance to the research project. Additionally, evaluating the source for authority, the author's perspective, reliability, validity, and bias is crucial. A biased source can be problematic when it is expected to be neutral and objective, which may skew your understanding of a topic.
The level of bias and the differing arguments and perspectives come into play when discussing contestable sources. Bias can manifest as a lack of balance between facts and opinions or through the author's intentional efforts to persuade. Recognizing the author's purpose can help in discerning the extent of the bias: whether the source is meant to inform or to persuade. Analyzing the writer's background and expertise on the topic can also provide insight into potential biases.
Contestable sources often offer different interpretations and discussions. Comparing information from multiple sources and identifying discrepancies can lead to a more informed consensus view. When sources corroborate each other, the findings become more credible, but when they present contrary information, it is important to conduct further research to understand the issue from various angles.