3.2 Drawing Logical Inferences and Context Vocabulary

ASTB-E Aviation Selection Test Battery Navy/Marines

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1 Chapter 1: Math Skills Test (MST) - Basic Math & Algebra

1.1 Arithmetic, Fractions, Decimals, and Percentages 1.2 Algebraic Operations, Equations, and Inequalities 1.3 Exponents, Roots, and Scientific Notation 1.4 Sequences, Series, and Number Properties

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3 Chapter 3: Reading Comprehension Test (RCT)

3.1 Identifying Main Ideas and Passage Structure 3.2 Drawing Logical Inferences and Context Vocabulary 3.3 Strategies for Technical and Dense Military Passages

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3.2 Drawing Logical Inferences and Context Vocabulary

Key Takeaways Explain This Topic AI

Logical inferences are necessary deductions based strictly on the text's evidence, not external assumptions.

Identifying hidden assumptions requires finding the unstated premise that connects an author's evidence to their conclusion.

Context clues, such as synonyms, antonyms, and contrast words, are vital for defining unfamiliar vocabulary.

Analyzing a word's morphological components (roots, prefixes, suffixes) can help deduce its meaning in complex technical texts.

Last updated: July 2026

Drawing Valid Logical Inferences

The ability to draw logical inferences is perhaps the most challenging and critical skill tested on the ASTB-E Reading Comprehension Test. While main idea questions ask you to identify what is explicitly stated in the text, inference questions require you to determine what is implicitly suggested or logically implied by the author. To draw a valid inference, you must read between the lines, combining the explicit information provided in the passage with standard logic to arrive at a conclusion that is strongly supported but not directly written. This is fundamentally different from making an assumption. An assumption is a leap of faith not grounded in the text, whereas a logical inference is a necessary deduction that must be true if the statements in the passage are true. When approaching inference questions, it is vital to adhere strictly to the boundaries of the passage. Do not bring outside knowledge or personal opinions into your analysis, as this is a common trap designed to lead you to incorrect answers. Instead, focus entirely on the evidence presented by the author. Look for subtle clues in the language, such as qualifying words (e.g., 'most,' 'some,' 'rarely,' 'typically') or contrast words (e.g., 'however,' 'although,' 'despite'). These words often signal nuances in the author's argument that form the basis for logical inferences. For instance, if a passage states that 'Early jet engines were highly inefficient at low altitudes, prompting researchers to seek alternative propulsion methods,' you can logically infer that efficiency at low altitudes was a significant priority for aviation researchers at that time, even though the passage does not explicitly state 'efficiency was a priority.' Developing the skill to recognize these implicit connections requires practice and a keen attention to detail. As you read, continuously ask yourself: 'If this sentence is true, what else must necessarily be true?' By anticipating logical consequences, you prepare yourself for the most difficult inference questions on the exam.