"More simpler" is incorrect because the word "simpler" is already in the comparative form, so adding "more" in front of it is redundant and grammatically incorrect.
The correct way to say it would be either "more simple" or "simpler".
Context matters in English because the meaning of words can vary based on the surrounding words, phrases, or situation. Words often have multiple meanings, and the intended sense becomes clear through the context in which they are used.
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