Amina Inloes, Amina Inloes is originally from the US and has a PhD in Islamic Studies from the University of Exeter on Shi'a hadith. She is the program leader for the MA Islamic Studies program at the... Answered 9 months ago

This is referring to Qur'an 36:12 and there is some discussion here:

https://www.al-islam.org/ask/what-is-the-full-significance-and-historica...

If the phrase "imam mubeen" is understood to refer to a human Imam, such as Imam 'Ali, there is no reason why it has to refer to a human Imam who is presently living since the souls of humans exist after death, and the Qur'an states that martyrs are alive. Although, of course, it could, and God knows best.