I'm glad the top post in here kind clarifies it as "walking through situations in your head in which you have to explain things to people". Because I constantly do that but I don't need to "talk to myself" to make sense of abstract concepts. I tend to just visualize them however convenient. The "inner voice" part is just for preparing to having to explain the process to someone else, which can be helpful to order your thoughts but it's more of a byproduct than "the only way to think" for me.
I'm not sure if there's any science to this and I have doubts the questions about it have ever been formulated clearly enough for people to have an exact idea what we're even discussing here. I imagine most people can play through a potential interview in their heads and most people can think through an abstract problem (i.e. something with math/geometry) without having an inner monologue about it. It's more about how important it is to you to prepare for hypothetical conversations.
I'm not sure if there's any science to this and I have doubts the questions about it have ever been formulated clearly enough for people to have an exact idea what we're even discussing here. I imagine most people can play through a potential interview in their heads and most people can think through an abstract problem (i.e. something with math/geometry) without having an inner monologue about it. It's more about how important it is to you to prepare for hypothetical conversations.