Foundations of knowledge-2

There are some theories which are describing how the epistemic foundation can be formed for a particular belief  to being justified . One of them says that some beliefs are fundamental beliefs and other beliefs are grounded in them and it is so-called foundationalism. another one claims that the beliefs form a web of the beliefs and the legitimacy of a particular true belief to being a case of knowledge comes from a big circle of belief that this circle is started and finished on our assumed belief. it is supported by coherentists. Infinitism is  third one and it describes that the structure of justified beliefs is based on a never ended chain of the beliefs. There is a tough discussion in favor or against of any of these opinions of knowledge structure. for more inforamtion please refer to Stanford Encylopedia of philosophy.