I think these users are the same: [serina-chan](https://math.stackexchange.com/users/558914/serina-chan) and [emily-elle](https://math.stackexchange.com/users/557452/emily-elle). Here's what makes me suspicious: the use of textbf to bolden whole sentences, the repetition of a grammar error: use of 'help' in its plural form in a comment [here](https://math.stackexchange.com/questions/2767435/the-mabinogion-sheep-problem-martingale#comment5711081_2767435) and in the questions of serina-chan
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