Why is Telemachus doubtful that the man before Odysseus is his father?

Telemachus is doubtful that the man before him is his father, Odysseus, because he struggles to reconcile the stories he has heard about Odysseus's adventures with the worn and ragged appearance of the stranger. Additionally, he has been raised in a state of uncertainty about his father's fate, leading him to question whether the man truly is the legendary hero he has longed for. This doubt is compounded by the fact that Odysseus himself has disguised his identity, making it even harder for Telemachus to believe.