The paper is an attempt to represent a study of limit points, boundary points, exterior points, border, interior points and closure points in the common generalized topological space. This paper takes a look at the possibilities of an extended topological space and it also considers the new characterizations of dense set.

What is science? Beyond Popper and Lakatos Why allowing non-falsifiable theories doesn’t make science soft and mushy Critics of the proposal, e.g. Stich Familiar construction kits Concrete and abstract construction kits Explaining what’s possible vs explaining what happens Historical note on "How is X possible?" Proving impossibility Eventual publication of the paper, in 1976, then as book-chap...