16. A system according to claim 15 and also comprising context based scoring of various alternative corrections, based at least partially on contextual feature-sequence (CFS) frequencies of occurrences in an internet corpus.
15. A system according to claim 1 and also comprising: a grammatical error suspector evaluating words in said input text; an alternatives generator, generating multiple alternatives for at least some of the words in said input text evaluated as suspect words by said suspector, at least one of said multiple alternatives for a word in input text being consistent with a contextual feature of said word in said input text; a selector for selecting among at least said multiple alternatives; and a correction generator operative to provide a correction output based at least partially on a selection made by said selector.