I have recently came across two sentences that feature the usage of singular nouns to generalise the statement as they follow.
"The presence of the gene predisposes a person to heart disease"
"Phrasal verbs simplify and enliven language in a very flexible way"
In the first sentence, according to GPT, heart disease is singular to deliver that the gene can make anyone vulnerable to any kind of heart disease. At the same time, instead of saying heart diseases, the use of the singluar noun gives an impression that the sentence is not going to talk about what specific heart diseases the gene triggers in the following sentences.
Pretty much the same, in the second example, GPT says language is singular to encompass various concepts related to the use of language such as grammar structure, way to express etc, whereas using the plural form indicates that the following is going to talk about how pharal verbs can be used in different languages.
Thank you for reading so far, and I would like to ask if what I stated above is correct and how can I understand the use of singular noun to better understand generalisation?
Thank you so much