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Critical Thinking and Intelligence Analysis

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a solution to the issue. Differences among various analytic<br />

methodologies, techniques, <strong>and</strong> tools are not trivial.<br />

In fact, comparing the results of different analysis methods can be<br />

a valid means of establishing the accuracy of the answer. If various<br />

means of analysis yield multiple results, a review by different analysts<br />

makes for the ideal environment for critical thinking to discuss <strong>and</strong><br />

debate those results. 134<br />

Therefore, assessment of the available evidence includes<br />

redirecting thinking, soliciting feedback from other sources, appraising<br />

the quality of possible answers, <strong>and</strong> comparing initial goals with<br />

results. In so doing an analyst employs interpretive <strong>and</strong> evaluative<br />

skills to select the best mass of evidence to analyze.<br />

Creating Better Inferences<br />

<strong>Critical</strong> thinking aims to ensure that inferences are reasonable<br />

<strong>and</strong> evidence-based. Inference creation begins at the same time<br />

that analysis starts. As each piece, or the whole mass of evidence, is<br />

considered, inferences are made. 135<br />

Resulting “chains” of inferences<br />

linking the evidence to the hypotheses under consideration are known<br />

as arguments. Chains of inferences converge – strengthening the<br />

argument – or diverge – weakening it. The self-reflective nature of<br />

critical thinking places a check on these inferences. The analyst asks,<br />

“Do my inferences flow from the evidence” <strong>and</strong>, “Are my inferences<br />

logical given the evidence <strong>and</strong> other inferences I have made”<br />

Inferences lead to a search for additional evidence. In other<br />

words, based on inferences drawn from the evidence at h<strong>and</strong>, an<br />

analyst may infer that there are other sources of evidence to consider.<br />

For example, such reasoning was cited in the explanation of why<br />

134 For a more detailed discussion of this <strong>and</strong> other means of countering<br />

biases, see Heuer, Psychology, 170–184; Irving Janis, Groupthink: Psychological Studies of<br />

Policy Decisions <strong>and</strong> Fiascoes, 2 nd Edition (Boston, MA: Houghton Mifflin Company,<br />

1982); <strong>and</strong> Scott Plous, The Psychology of Judgment <strong>and</strong> Decision-making (New York,<br />

NY: McGraw Hill, Inc., 1993).<br />

135 Indeed, the analyst’s acceptance – or rejection – of this evidence is a result<br />

of inferences: either the evidence is valid, credible, <strong>and</strong> relevant, or it is not.<br />

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