User talk:Sorina sotis
Hi, thanks for the material you added to the brain fitness article. There are a couple of serious issues with it, though.
First, it is against copyright rules to construct a major part of an article out of material copied from other copyrighted articles. This applies even if the material is placed in quotation marks and if the sources are specified. The valid use of quotations is in cases where the wording of the source itself is the topic that is being written about. Otherwise, fair use requires putting the information in your own words. For more information see WP:QUOTEFARM and the paragraphs that follow.
Second, Wikipedia articles should avoid speculating or giving personal opinions, unless the speculations or opinions are attributed directly to a cited source. I count at least three places in your contribution that violate this principle. For more information see WP:OR.