Here's why:
* Missing a verb: You need a verb to connect the subject ("talent") and the object ("this").
* Incomplete thought: The sentence doesn't express a complete idea.
Here are some ways to correct it:
* "Is talent this?" (This is a question asking if "talent" is the same as "this".)
* "Talent is this." (This is a statement saying that "talent" is the same as "this".)
* "This is a talent." (This is a statement identifying "this" as a talent.)
You need to provide more context to understand what you are trying to say.