sentence validation

i need a method that takes in a string, checks it of a lexicon, then returns whether the sentence is valid english or not.
jack88880Asked:
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sciuriwareConnect With a Mentor Commented:
That's very difficult, there a 4 levels:

1) checking the words against a dictionary or word list,
2) checking the remainder for legal derivates,
3) checking for the mandatory elements of a good sentence to be present or defined,
4) checking for the meaning of a sentence in the context of earlier sentences.

1 & 2 are done by a spelling checker.
3 is sometimes done by a grammar checker.
4 requires artificial intelligence of a high level.

If you pick a spell checker from the public domain, you'll see
how difficult even levels 1 & 2 are; let alone the rest .....

;JOOP!
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