Knowledge is a familiarity, awareness, or understanding of someone or something, such as facts, information, descriptions, or skills, which is acquired through experience or education by perceiving, discovering, or learning. 

Knowledge can refer to a theoretical or practical understanding of a subject. It can be implicit (as with practical skill or expertise) or explicit (as with the theoretical understanding of a subject); it can be more or less formal or systematic. In philosophy, the study of knowledge is called epistemology; the philosopher Plato famously defined knowledge as "justified true belief", though this definition is now thought by some analytic philosophers to be problematic because of the Gettier problems while others defend the platonic definition. However, several definitions of knowledge and theories to explain it exist. 

Knowledge acquisition involves complex cognitive processes: perception, communication, and reasoning; while knowledge is also said to be related to the capacity of "acknowledgment" in human beings. 

The definition of knowledge is a matter of ongoing debate among philosophers in the field of epistemology. The classical definition, described but not ultimately endorsed by Plato, specifies that a statement must meet three in order to be considered knowledge: it must be justified, true, and believed. Some claim that these conditions are not sufficient, as Gettier case examples allegedly demonstrate. There are a number of alternatives proposed, including Robert Nozick's arguments for a requirement that knowledge 'tracks the truth' and Simon Blackburn's additional requirement that we do not want to say that those who meet any of these conditions 'through a defect, flaw, or failure' have knowledge. Richard Kirkham suggests that our definition of knowledge requires that the evidence for the belief necessitates its truth.
Who said knowledge is justified true belief?
Do recent philosophers agree?
Why do some disagree?
How is knowledge obtained?
Is it implicit or explicit?
What does it mean to be implicit?
And explicit?
What term is used for the study of knowledge?
How many processes are involved with acquiring knowledge?
Are these simple processes?
Would communicating be one of them?
Is there much disagreement about the definition of knowledge?
In the classical sense, how many things must be true for something to be considered knowledge?
What are those?
Who described this definition?
Did he agree with the premise?
What do some philosophers claim?
What showed that that is likely the case?
What requirement would Nozick add to the list?
What does Kirkham say the definition should also require?
Plato
Plato famously defined knowledge as "justified true belief"
some do
 though this definition is now thought by some analytic philosophers to be problematic
because of the Gettier problems
hough this definition is now thought by some analytic philosophers to be problematic because of the Gettier problems 
unknown
unknown
its both
 It can be implicit (as with practical skill or expertise) or explicit (as with the theoretical understanding of a subject)
like as with practical skill or expertise
It can be implicit (as with practical skill or expertise)
as in the theoretical understanding of a subject
explicit (as with the theoretical understanding of a subject)
epistemology
the study of knowledge is called epistemology; 
Three
Knowledge acquisition involves complex cognitive processes: perception, communication, and reasoning;
no
involves complex cognitive processes:
yes
s complex cognitive processes: perception, communication, and reasoning
yes
The definition of knowledge is a matter of ongoing debate among philosopher
three
, described but not ultimately endorsed by Plato, specifies that a statement must meet three in order to be considered knowledge:
it must be justified, true, and believed.
in order to be considered knowledge: it must be justified, true, and believed.
Plato
described but not ultimately endorsed by Plato
no
 described but not ultimately endorsed by Plato,
they claim that these conditions are not sufficient
Some claim that these conditions are not sufficient,
Gettier case examples
 as Gettier case examples allegedly demonstrate
that  knowledge tracks the truth
Robert Nozick's arguments for a requirement that knowledge 'tracks the truth'
evidence
Kirkham suggests that our definition of knowledge requires that the evidence for the belief necessitates its truth