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Recent edit to Black swan

Hello, and welcome to Wikipedia. I noticed that you made a change to an article, Black swan, but you didn't provide a reliable source. It's been removed for now, but if you'd like to include a citation and re-add it, please do so! If you need guidance on referencing, please see the referencing for beginners tutorial, or if you think I made a mistake, you can leave me a message on my talk page. Thank you! Materialscientist (talk) 09:44, 19 August 2016 (UTC)

December 2016

Hello. This is a message to let you know that one or more of your recent contributions, such as the edit you made to Xu, did not appear constructive and has been undone. Please take some time to familiarise yourself with our policies and guidelines. You can find information about these at our welcome page which also provides further information about contributing constructively to this encyclopedia. If you only meant to make test edits, please use the sandbox for that. If you think I made a mistake, or if you have any questions, you may leave a message on my talk page. Thank you. JohnBlackburne^words_deeds 18:57, 30 December 2016 (UTC)

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April 2019

Hello, I'm CLCStudent. I wanted to let you know that one or more of your recent contributions to Bankruptcy have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the help desk. Thanks. CLCStudent (talk) 16:28, 18 April 2019 (UTC)

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