What is my true rank?

When team builder was around, I was matched against diamond players mostly. I was matched with master/challenger players for a bit.

My curent standing in solo/duo ranked is silver.

So what is my true rank?

Am I a silver skilled player but master skilled at team comps?

Perhaps I am diamond skilled but don't play roles that carry the team easily?

Maybe I am silver and just got lucky with team builder?