Sentence Logic and Consistency - ISEE Middle Level: Verbal Reasoning

Use them only when the second idea contrasts with the first. Employ 'but' or 'however' solely to introduce an idea opposing the preceding one.

She was exhausted; therefore, she went to bed early. Substitutes 'however' with 'therefore' to establish a logical causal relationship.

Correct: "The solution was complex and required many steps.". Adjusts 'simple' to 'complex' and 'complex' to 'many' to align the description consistently.

Items in a series must share the same grammatical form. Parallel structure demands uniform grammatical construction for all items in a series.

A conclusion that does not logically follow from the premise. A non sequitur features a conclusion that lacks logical connection to the preceding premise.

All parts agree in meaning; no internal contradictions occur. Logical consistency requires that all sentence components harmonize without any conflicting meanings or implications.

Contradiction. A contradiction arises when a sentence asserts mutually exclusive ideas simultaneously.

Although it was raining, the sky was overcast. Substitutes 'cloudless' with 'overcast' to resolve the impossibility of rain under a clear sky.

Correct: "He whispered softly so no one would hear.". Replaces 'loudly' with 'softly' to eliminate the oxymoronic description of whispering.

Pronouns must match their antecedents in number and person. Pronoun-antecedent agreement in number and person prevents logical mismatches within the sentence.

Correct: "If one studies, one will improve.". Adjusts 'you' to 'one' to maintain consistent second-person impersonal reference.

Maintain a consistent tense unless a time shift is required. Consistent verb tense preserves temporal logic unless a deliberate shift is justified.

Correct: "She walked to school and forgot her lunch.". Shifts 'forgets' to 'forgot' to align with the past tense established by 'walked'.

Correct: "Her salary is higher than her assistant’s salary.". Appends 'salary' to enable a direct comparison between equivalent items.

Modifiers must clearly and logically refer to the intended word. Modifiers must unambiguously attach to the appropriate word to avoid illogical interpretations.

Correct: "Running down the street, I felt my backpack bounce.". Adds 'I felt my' to provide a logical subject for the participial phrase 'running down the street'.

The stated cause must plausibly lead to the stated effect. Cause-and-effect logic demands that the cause reasonably produces the described effect.

Because I was hungry, I ate more than usual. Alters 'less' to 'more' so hunger logically results in increased eating.

Correct: "He is tall, but that does not indicate his job.". Revises the illogical inference by stating no correlation between height and occupation.

Quantifiers must not conflict with each other in the same claim. Quantifiers must align without creating inherent contradictions in the sentence's claim.

Correct: "Some of the cookies were eaten, but most remained.". Replaces 'all' with 'some' and rephrases to avoid conflicting quantity descriptions.

Place "only" next to the word or phrase it limits. Position 'only' adjacent to its intended target to prevent misinterpretation of scope.

She said only once that she liked the book. Moves 'only' before 'once' to precisely limit the frequency of the statement.

Correct: "He likes hiking, swimming, and biking.". Changes 'to swim' to 'swimming' to match the gerund form of other list items.