Read the excerpt from the general prolgue to the canterbury tales.
in the king’s service he’d fought valiantly,
and travelled far; no man as far as he
in christian and in heathen lands as well,
and ever honoured for his ability.
in this excerpt, the narrator may be unreliable because

he is making a contradictory statement.
he is exaggerating the truth.
he is doubting his own abilities to tell a story.
he is acting naive and inexperienced.