3. Definition of Inferences
• Inference is a mental process by which we reach a conclusion based on specific
evidence. Inferences are the stock and trade of detectives examining clues, of
doctors diagnosing diseases, and of car mechanics repairing engine problems. We
infer motives, purpose, and intentions.
• We engage in inference every day. We interpret actions to be examples of behavior
characteristics, intents, or expressions of particular feelings. We infer it is raining
when we see someone with an open umbrella. We infer people are thirsty if they
ask for a glass of water. We infer that evidence in a text is authoritative when it is
attributed to a scholar in the field.
• We want to find significance. We listen to remarks, and want to make sense of
them. What might the speaker mean? Why is he or she saying that? We go beyond
specific remarks to underlying significance or broader meaning. When we read
that someone cheated on his or her income taxes, we might take that as an
example of financial ingenuity, daring, or stupidity. We seek purposes and reasons.
• Inferences are not random. While they may come about mysteriously with a
sudden jump of recognition, a sense of "Ah ha!," inferences are very orderly.
Inferences may be guesses, but they are educated guesses based on supporting
evidence. The evidence seems to require that we reach a specific conclusion.
4. Inference and Analysis
• Inferences are based on evidence. To infer, we must collect evidence.
Evidence is collected by the process of analysis.
• Analysis is a particular form of investigation. In general usage, analysis
refers to any close, careful, or systematic examination. In the discussion
here, the term “analysis“ is used in its more technical meaning.
• Analysis is a process of investigating something by breaking it into parts
for closer examination. Complex topics are broken down into simpler
ones. Intricate patterns are broken down into less complicated elements.
A problem is simplified by limiting the amount that must be examined at
any one time.
• The goal of analysis is not simply to discover parts within the whole, but to
understand the whole. Once the parts are identified, analysis then seeks
to determine how those parts are related.
• In the analytic model, the whole is seen as greater than the sum of its
parts.
5. Science and Inferences
• In science, an inference refers to reasonable
conclusions or possible hypotheses drawn from a small
sampling of data based upon repeated observations.
• Scientists make inferences all the time. The inference
can take several forms.
• A hypothesis or a theory is a starting point. This may
be an inference made when a person observes
something in the known world, and sets out to test
whether the hypothesis or inference holds up, one is
beginning to employ the scientific method, a way to
prove an inference as correct or incorrect..