This is false: it has a very negative connotation.
It refers to a smile that is mocking or contemptuous (or a remark that is mocking or contemptuos) - so it's not a genuine smile, but an ironic and sarcastic smile. It has a negative and not a neutral connotation.
<span>Expository
essay writing provides facts, considers ideas, describes processes or
events, or analyzes themes, arguments, or other works that can be
interpreted. This essay must start with a strong introductory paragraph
that contains a thesis statement. The thesis statement should be clear,
short, and well-defined. Remember, the thesis statement is the writer’s
major point, argument, or essential idea and should be cautiously
narrowed to explain where the essay is headed.</span>
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