From Skiathos, you can reach Skopelos, Allonissos, and Skyros.
You can reach Allonissos, Skopelos and Skyros, if you start from Skiathos.
mnli hypothesis: You can reach Allonissos, Skopelos and Skyros, if you start from Skiathos. premise: From Skiathos, you can reach Skopelos, Allonissos, and Skyros.