Summary
Highlights
Critical thinking, in academic philosophy, means careful or logical thinking, not negative thinking. It involves three broad areas: analyzing others' arguments, constructing one's own arguments, and repairing arguments (either one's own or others'). An 'argument' in philosophy is a series of claims (premises) intended to logically support another claim (conclusion).
To analyze an argument, first identify the core statements by stripping away extraneous information. Look for premise indicators (e.g., 'since', 'because') and conclusion indicators (e.g., 'therefore', 'thus'). Assign numbers to claims to diagram the logic and visualize how premises support the conclusion, including implicit premises.
After identifying an argument, analyze its internal logic before judging the truth of its premises. A 'valid' argument is one where if the premises were true, the conclusion *must* be true. This often involves 'all' statements, and diagrams can help visualize the relationships between categories and individuals.
The next step is to examine the truth or plausibility of the premises. Ask if a premise conflicts with personal experience, is confirmed by an unbiased expert, or if the source has a conflict of interest or motive to mislead. Be wary of claims from non-experts or those with vested interests.
Philosophers construct arguments similarly to how scientists reveal empirical truths. The method involves stating a candidate argument, clarifying concepts, identifying premises and conclusions, rewording for clarity, discarding superfluous information, diagramming, and then judging its internal logic and premise plausibility. The goal is to pursue truth with an open mind and be willing to change one's views based on evidence and strong arguments.
Conceptual analysis involves clearly defining concepts used in an argument. For instance, to accuse someone of 'lying', one must understand that lying requires intentionally passing off something known or believed to be false as true. A person who is merely mistaken is not a liar.
Reasoning fallacies are common mistakes in informal logic. The 'genetic fallacy' is endorsing or rejecting an argument based solely on its source, rather than the content itself. For example, liking or disliking the person making a statement does not affect the statement's validity or truth.
When using numbers in arguments, present data transparently and accurately. Misleading graphs can distort reality, even with numerically correct figures. The goal of critical thinking is to understand what makes the most sense, not to trick others with selectively presented data.
Avoid the fallacy of assuming that simply because one event follows another, the first caused the second (post hoc ergo propter hoc). Complex situations, like the economy, are influenced by many factors, and attributing outcomes solely to one cause (e.g., a president's policies) can be an oversimplification.
Reasoning by analogy involves comparing two cases and applying similar logic if they are relevantly similar. However, it's crucial to identify relevant dissimilarities. For instance, while both parents contribute to a child's creation, the physical and hormonal changes a mother undergoes after childbirth create significant dissimilarities that impact arguments for equal parental leave based solely on shared parenthood.
Instead of immediately discarding a flawed argument, try to repair it by identifying and removing weak premises. By salvaging strong parts of an argument, you can reconcile differences and deepen your understanding. Applying the same critical and careful eye to your own arguments is essential for growth as a thinker.