If in a tragic drama the lady who killed her kids was just a crazy person will it still be a tragic drama? (Greek theater)

Yes, it would be a tragic drama as the events occuring are tragic itself, its like the embodiment of despair.

it's like watching a fable, it's not really about the animals but rather it has a meaning that is understood by us and that is implicit, not explicitly said. implicit ideas are common and are used in almost all works of art, from writing to painting to sculpting.

mark twain, real name samuel langhorne clemens, was an american writer, humorist, entrepreneur, publisher, and lecturer. among his novels are the adventures of tom sawyer and its sequel, the adventures of huckleberry finn, the latter often called "the great american novel". wikipedia