1. A computer-implemented method, comprising: storing, in computer memory, a textual work; generating an N-gram of N words of the textual work; generating a 2-dimensional plot based, at least in part, on the N-gram; storing, in computer memory, data corresponding to at least one 2-dimensional representation of at least one pre-determined machine generated work; processing the 2-dimensional plot and the at least one 2-dimensional representation to obtain a score indicative of a correlation between characteristics of the textual work and characteristics of the at least one pre-determined machine generated work; and determining, based at least in part on the score, that the textual work comprises at least a portion of machine generated grammatically unintelligible text.