Final answer:
Samuel Taylor Coleridge was a poet, literary critic, and playwright, but not a scientist. The correct answer to the student's question is that Coleridge was not a 'Scientist'.
Step-by-step explanation:
In response to the student's question, Samuel Taylor Coleridge was a distinguished figure of the Romantic Era, known primarily as a poet, literary critic, and playwright. He is not, however, known to have been a scientist. Although he wrote The Rime of the Ancient Mariner, he was not a mariner himself. That narrative poem does not reflect his personal experiences at sea but is rather a work of imagination and literary artistry. Therefore, in the context of Coleridge's professions, the correct answer is that he was all of the following except a 'Scientist'.