Student or Learner
I don't know why there is no "a" in :
1) There's no such thing...
Shouldn't it be like "There's no such A thing..." ? We normally say "Such a thing..." or "There is such a thing..." don't we ?
2) I'm only A human or I'm only human...
Here's a sentence from Longman Dictionary of Contep. Eng. :
"He's not human, he's an empty space disguised as a human" (in the first part there's no "a", in the second one, on the contrary.
"To be treated as a human..."
In [1a], "a" is a determiner and it modifies the noun "thing".
[1a] There is not such a thing.
"not" is an adverb. It modifies the verb "is". Below, in [1b], "no" functions as a determiner. It modifies the noun "thing",
[1b] There is no such thing.
In English, there can be only one determiner per noun, which is why [1c] is incorrect. There are too many determiners here,
[c] *There is no such a thing.
The word "human" can function as a noun or as an adjective. In our example [2a] below, "human" functions as a noun; it's synonymous with a person (who is a member of the genus Homo sapien), whereas in [2b] "human" functions as an adjective, expressing having human attributes.
[2a] I'm only a human. <noun, synonymous with a person>
[2b] I'm only human. <adjective, having human attributes>
EX: He's not human [i.e., adjective: he doesn't have human attributes), he's an empty space disguised as a human [i.e., noun, a person who is a member of the genus Homo sapien.
EX: To be treated as a human [as a person] ...