Question

what does the idiom in this text suggest?
i walked across an empty land
i knew the pathway like the back of my hand.
—keane, \somewhere only we know\
the singer has walked the path many times before.
the singer has never walked on the path before.
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Explanation:

The idiom "like the back of my hand" means to know something extremely well, which implies the singer has walked the path numerous times.

Answer:

The singer has walked the path many times before.