eric_p_m wrote:Dear Meylenlau,
The type of generalization you are talking about grammatically requires plural usage. The type of distinguishing characteristic you are referring to reminds me of the differing definitions between the use of "fish" and "fishes". In general, "fish" is considered to be an uncountable noun, but if you are trying to distinguish multiple types of fish, which are different from each other, then you should utilize "fishes".
As far as "dog" and "dogs" go, I agree and hopefully reinforce Odyssey's previous lucid explanation for your further reference.
Eric Paul Monroe
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