The sentence 'I saw the man with the telescope' has two distinct meanings. What produces this ambiguity?
AThe prepositional phrase 'with the telescope' can attach to the NP 'the man' or to the VP 'saw the man,' producing two different phrase structure trees with different meanings
BThe verb 'saw' is ambiguous, referring either to visual perception or to the act of cutting with a saw
CThe pronoun 'I' is ambiguous about the identity of the speaker, creating two possible interpretations
DThe sentence lacks a clear object, so listeners must infer the meaning from context
This is structural ambiguity — two meanings arising from two different phrase structures, not from any word having multiple meanings. In one tree, 'with the telescope' is a PP inside the NP, modifying 'the man' (the man had a telescope). In the other tree, 'with the telescope' is a PP inside the VP, modifying the act of seeing (I used a telescope). The words are identical; what differs is the hierarchical bracketing. This demonstrates that meaning depends on structure, not just on the sequence of words.
Question 2 Multiple Choice
A linguist wants to test whether 'the elderly professor from Vienna' is a single constituent in 'The elderly professor from Vienna won the prize.' Which result would confirm constituency?
AThe entire phrase can be replaced by 'she' and the sentence remains grammatical — substitution confirms it is a single NP
BEach individual word in the phrase can be replaced separately, showing they are independent constituents
CThe phrase contains more than three words, which is the minimum for a phrase to be a constituent
DThe phrase ends just before the verb, which automatically makes everything before a verb a constituent
The substitution test (pro-form replacement) is one of the primary constituency tests. If 'the elderly professor from Vienna' can be replaced by a single pronoun 'she' — 'She won the prize' — and the sentence remains grammatical and preserves the core meaning, this confirms the group functions as a single unit (a noun phrase). Option B describes individual word substitution, which tests word-level rather than phrase-level constituency. Options C and D describe non-criteria: length doesn't determine constituency, and position relative to the verb is not a constituency test.
Question 3 True / False
A single-word noun like 'cats' counts as a complete noun phrase (NP) in linguistic analysis.
TTrue
FFalse
Answer: True
A phrase is defined by its structural role and the presence of a head word, not by its length. A bare noun like 'cats' in 'Cats are independent' occupies the NP position and functions as the subject — it has a nominal head with no additional specifiers or modifiers, but it is still a full NP. X-bar theory makes this explicit: every phrase has a head, and a phrase can consist of just its head. The misconception that phrases must be multi-word comes from conflating 'phrase' in the everyday sense with 'phrase' as a technical linguistic term.
Question 4 True / False
Structural ambiguity is a property of a speaker's confusion — it arises when a speaker is unsure which meaning they intend.
TTrue
FFalse
Answer: False
Structural ambiguity is a property of the sentence itself, not of any speaker. 'I saw the man with the telescope' has two valid phrase structure trees regardless of whether any speaker is confused. Both readings are equally grammatical and equally well-formed. A speaker uttering the sentence has one interpretation in mind, but the sentence itself encodes both. This matters for linguistics because it shows that sentences must be analyzed as structured objects, not just as speaker intentions. Ambiguity that cannot be resolved from word meaning alone demonstrates that hierarchical structure is doing real semantic work.
Question 5 Short Answer
Explain how structural ambiguity demonstrates that sentence meaning depends on hierarchical phrase structure rather than just the linear order of words.
Think about your answer, then reveal below.
Model answer: Structural ambiguity shows that a single linear sequence of words — identical word order, identical word choices — can be assigned two or more different phrase structure trees, yielding two or more different meanings. In 'I saw the man with the telescope,' the words appear in exactly the same order in both interpretations, but attaching the PP 'with the telescope' to the NP versus to the VP produces different hierarchical structures and different meanings (who had the telescope). If meaning depended only on word order, one sequence of words would have one meaning. The fact that it can have two proves that hierarchical bracketing — constituency — is a genuine component of semantic interpretation, not just a notational convenience.
This is the deepest argument for why constituency and phrase structure matter: they do real work in meaning. A flat-string theory of language (where sentences are just sequences of words) cannot explain structural ambiguity — it would predict that each word sequence has one meaning. The necessity of hierarchical structure is demonstrated every time a sentence like this one can be understood two ways.