Imo it is not possible for google to detect properly spun content, it is not worth computing power it requires. They can do this using ngrams for example, but it is uses a lot of queries. And for example article spinner I coded beats this algo, so google cant detect that the content is spun. Manual spinning is also good but it takes more than 30 minutes per article.
Once upon a time there lived a boy. He had blue eyes with blond hair as yellow as gold. The young boy was small and fragile, but his mind was swift like the wind. He could calculate the outcome of any situation in the blink of an eye. But that was not his biggest talent. No. His biggest talent was perception. The young boy could understand and perceive anything faster than anyone he had ever met. Then, he fell in love with a beautiful princess. She had magnetic green eyes and light brown hair. He loved her very much and she loved him back even more. There was only one problem – the young boy was the son of a blacksmith. The princess’s father would never allow her to marry a simple son of a blacksmith. But their love was too strong. In one fell swoop, the young boy raised an army of undead and started a rebellion to overthrow the evil king who did not believe in true love. After months of fighting against the armies of his beloved’s father, the young boy was assassinated and the war was over. No songs were sang.
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