THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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However, it's arguable that the stop-list makes an assumption that everyone speaks English – in some non-English-language countries, a nonspam corpus may contain no English terms while the spam corpus is mostly-English, in which case those stop-words would actually make good spam signs.
Hence, I don't think it's a good idea to increase the stop-list with additional "common" english words.