Verisimilitude tends to be based around the appearance or proximity to being real, or the truth. It was a large part of the work of Karl Popper, and can be used in a variety of different ways to describe something, as well. It is a way of implying the believability or likelihood of a theory or narrative. However, just because something can be described as having Verisimilitude does not mean that it is true, only that merely appears to or seems to be true.
It can be used in a variety of ways, for example;
“While some dislike the content of the novel due to its graphic nature, you cannot deny that the content certainly gives the book some Verisimilitude”
An example of Verisimilitude in concept, though, could be a doubtful statement in a court of law or even a false testimonial for a restaurant. If something “seems” like it’s all well and good, but you can’t quite decide, then it can be said to have Verisimilitude.