Why does telemachus doubt that this man is his father?

Telemachus doubts that the man before him is his father, Odysseus, because of the extraordinary circumstances surrounding Odysseus's long absence and the dramatic transformation he has undergone. Having grown up without his father, Telemachus struggles to reconcile the stories and memories he has with the rugged stranger who appears before him. Additionally, he is influenced by the uncertainty and disbelief fostered by the suitors in his home, who question Odysseus's identity. This mix of disbelief, fear of deception, and a longing for his father contributes to Telemachus's doubt.