Here's a breakdown:
Sentence 1: "Could this be invisible hair tonic?"
* Ambiguity: The sentence could be interpreted in two ways:
* Questioning the nature of a product: The speaker is unsure if a particular product is an invisible hair tonic.
* Expressing disbelief: The speaker is surprised or skeptical about something being an invisible hair tonic, implying that such a thing is unlikely or impossible.
Sentence 2: "Old matron fed her dog biscuits."
* Ambiguity: The sentence is ambiguous due to the lack of clarity regarding the "her" pronoun.
* Interpretation 1: The old matron fed biscuits to her own dog. This is the most likely interpretation, given the natural assumption that a matron would be feeding her own pet.
* Interpretation 2: The old matron fed biscuits to someone else's dog. This interpretation is less likely, as it requires us to imagine a scenario where the matron is feeding a dog that isn't her own.
In both sentences, the ambiguity arises from the lack of clear context and the potential for different interpretations of the words and phrases.