Which of the following is correct?
(1) The dog is half wolf.
(2) The dog is a half wolf.
If (1) is correct, is "wolf" an uncountable noun or an adjective?
Which of the following is correct?
(1) The dog is half wolf.
(2) The dog is a half wolf.
If (1) is correct, is "wolf" an uncountable noun or an adjective?
The correct formulation is: The dog is half wolf.
In this sentence, half wolf forms a predicate nominative which means that the sentence doesn’t change meaning if the subject and predicate are inverted. “Half of the dog’s nature is wolf” is an exactly equivalent statement.
Diagrammatically, the sentence reads “dog is wolf”. The is an article adhering to dog, and half is either an adjective describing wolf, or arguably (and probably better) an adverb that modifies “is” by itself would imply a full equality, whereas the more likely desired result is to say that half is the exact nature of the relationship.
Note that the subject dog could either be the dog (demonstrably a single dog to which your are referring) or a dog, implying that any and or all dogs are half wolf. In either case, however, an article would force the word half to modify wolf, rather than the verb is, and, in doing so, make for an awkward construction. It is awkward because half a wolf is a very concrete (if somewhat messy/gory depending on how you slice it) thing.
(1) and (2) are both grammatical; (1) seems more idiomatic to me.
The word "half" can be used before adjectives, as in "The dog is half dead".
Nevertheless, I would be inclined to say that "wolf" is not lexicalized as an adjective in this construction. It's hard for me to be sure, but one reason is the productivity: I feel like pretty much any noun or nominal phrase could be put after "half" to form this kind of phrase. Here is an example of "half" being used with the nominal phrases "proud father" and "wide-eyed child":
the court system's chief for public safety -- referred to by other officers strictly and simply as Chief -- looked on with an expression that was half proud father and half wide-eyed child on Christmas morning.
("Justice Is Blind, but a Court Surveillance System Sees All", by Seth Schiesel, The New York Times, Sept. 2, 2004)
I don't know enough about grammatical theories of parts of speech to say whether it makes sense to say that any nominal phrase turns into an adjective in this context. But I would say that it wouldn't make sense for a dictionary to use these kind of examples as evidence for listing "adjective" as a part of speech in an entry for a word.
If it is a noun, I suppose it might technically qualify as an "uncountable noun", but that's not how I would think of it. I'm not sure whether all nouns that are in the singular form without an article are really "uncountable" in the sense that nouns like water or mud are "uncountable".
Considering that half wolf is another name for the breed Wolfdog (wolf–dog hybrid), the correct sentence should be "(2) The dog is a half wolf."
Wolf-dog Education says Mid-Contents (35%-74%) (are) g)enerally described as being “half wolf”.