We learn so much about the world, and we are able to recognize things very quickly because in the past we have had a lot of experience looking at and identifying random images.
We are able to learn about something new so quickly that we look at because in the past, as a child and an adult, we have been through a lot of experiences where we have seen something new and tried to guess what it is and been told what it is.
The process of learning is there as we took a hit at classifying what it was, but if we got it wrong we were corrected and we learnt from our mistakes.