The Question and Answer section for Gulliver’s Travels is a great resource to ask questions, find answers, and discuss the novel.
This depends on what you define as "credible". They represent English politicians with their petty politics and partisanship.
Do you mean the rocky island of Lilliput? When Gulliver awakens, he is lying on his back. He finds himself unable to sit up or move at all. His "Arms and Legs were strongly fastened on each side to the Ground; and [his] Hair, which was long and...
He was apprentice to a surgeon.
"I was bound Apprentice to Mr. James Bates, an eminent Surgeon in London."