User talk:Jhon Smith973

February 2019
Hello, and welcome to Wikipedia. This is a message letting you know that one or more of your recent edits to Locard's exchange principle has been undone by an automated computer program called ClueBot NG.

Thank you. ClueBot NG (talk) 19:32, 18 February 2019 (UTC)
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 * The following is the log entry regarding this message: Locard's exchange principle was changed by Jhon Smith973 (u) (t) ANN scored at 0.960267 on 2019-02-18T19:32:30+00:00