1. A coin sinks in water.

2. The coin sinks in water.
3. Coins sink in water.
4. Any coin sinks in water.
5. All coins sink in water.
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Thank you for your help.
One more similar question.
Are the sentences all in generic use?
Does #2 sentence mean the specific coin or a/the coin in general?

In this set, #2 refers to a particular coin. All the others refer to coins in general.

To determine whether the sentences are in generic use, let's define what generic use means in this context. In linguistics, generic use refers to when the subject of a sentence represents a whole class or category, rather than a specific individual or instance.

Now, let's analyze each sentence:

1. "A coin sinks in water": This sentence is not in generic use because it uses the indefinite article "a," suggesting that it refers to a specific, unidentified coin rather than coins in general.

2. "The coin sinks in water": This sentence is not explicitly in generic use. Using the definite article "the" suggests that a specific coin is being referred to, but it does not necessarily exclude the possibility of generalization. The sentence can be interpreted as referring to a specific coin in a given context, or it can be seen as implying that all coins sink in water.

3. "Coins sink in water": This sentence is in generic use since it does not specify any particular coin but makes a general statement about coins as a class. It implies that all coins have the property of sinking in water.

4. "Any coin sinks in water": This sentence is also in generic use. The word "any" indicates that the statement applies to all coins, without any exceptions.

5. "All coins sink in water": This sentence is in generic use as well. It clearly states that every single coin, without exception, sinks in water.

In summary, sentences 3, 4, and 5 are in generic use because they make general statements about coins as a class. Sentence 2 could be interpreted as either referring to a specific coin or making a generalized statement about coins, depending on the context. Sentence 1 is not in generic use as it refers to a specific unidentified coin.