Some of the things that are said about the signs of Imam Mahdi's (a.s.) re-appearance are not definite and they have not been mentioned in valid and documented narrations either.
Wasu daga cikin abubuwan da ake fadi na daga cikin alamomin bayyanar Imam Mahdi ba wasu abubuwa ne da za a iya cewa haka suke dari bisa dari ba; wasu ma ba abubuwa ne da za a iya tabbatar da su cikin ingantattun riwayoyi ba; riwayoyi ne masu rauni, ba za a iya dogaro da su ba.