Abstract: This invention provides hierarchical, gradual and iterative methods, systems, and software for improving and correcting natural language text. The methods comprise the steps of applying natural language processing (NLP) algorithms to a corpus of sentences so as to abstract each sentence; applying scoring and linguistic annotation to each abstract sentence; applying NLP algorithms to abstract input sentences; applying search algorithms to match an abstract input sentence to at least one abstract corpus sentence; and applying NLP algorithms to adapt said matched abstract corpus sentence to the input sentence.