Can the author be identified from one short message?
Sometimes the volume and variety of linguistic features are insufficient; whether an answer is possible is assessed from the materials.
Are samples from the presumed author needed?
A comparative examination usually requires texts of reliable origin.
Can a screenshot be examined?
A preliminary assessment is possible, but a copy may not reflect all the features of the text and its origin.
Does authorship examination identify the account owner?
It examines the text's linguistic features; technical account data require a different check.
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