The 6 Types Of Knowledge: From A Priori To Procedural

There is so much disagreement over what are,
exactly,
the different types of knowledge that an agreed upon “master list”
simply does not exist. This is because knowledge is purely
philosophical; debates span centuries, arguments supersede fact and
everyone has a different opinion about what is, or is not, knowledge.
What
follows is a master list (although, of course, it won’t be agreed upon)
of the different types of knowledge and theories of knowledge that are
out there. Turn this new-found “knowledge” on yourself with this awesome
1. A Priori
A priori and
a posteriori are two of the original terms in epistemology (the study of knowledge).
A priori literally means “from before” or “from earlier.” This is because
a priori knowledge depends upon what a person can derive from the world without needing to experience it. This is better known as
reasoning. Of course, a degree of experience is necessary upon which
a priori knowledge can take shape.
Let’s
look at an example. If you were in a closed room with no windows and
someone asked you what the weather was like, you would not be able to
answer them with any degree of truth. If you did, then you certainly
would
not be in possession of
a priori knowledge. It would simply be impossible to use reasoning to produce a knowledgable answer.
.
2. A Posteriori
Naturally, then,
a posteriori literally
means “from what comes later” or “from what comes after.” This is a
reference to experience and using a different kind of reasoning
(inductive) to gain knowledge. This kind of knowledge is gained by first
having an experience (and the important idea in philosophy is that it
is acquired through the five senses) and then using logic and reflection
to derive understanding from it. In philosophy, this term is sometimes
used interchangeably with empirical knowledge, which is knowledge based
on observation.
It is believed that
a priori knowledge is more reliable than
a posteriori knowledge.
This might seem counter-intuitive, since in the former case someone can
just sit inside of a room and base their knowledge on factual evidence
while in the latter case someone is having real experiences in the
world. But the problem lies in this very fact: everyone’s experiences
are subjective and open to interpretation.
3. Explicit Knowledge
Now
we are entering the realm of explicit and tacit knowledge. As you have
noticed by now, types of knowledge tend to come in pairs and are often
antitheses of each other. Explicit knowledge is similar to
a priori knowledge
in that it is more formal or perhaps more reliable. Explicit knowledge
is knowledge that is recorded and communicated through mediums. It is
our libraries and databases. The specifics of what is contained is less
important than how it is contained. Anything from the sciences to the
arts can have elements that can be expressed in explicit knowledge. Get a
taste of explicit knowledge for yourself with this
The
defining feature of explicit knowledge is that it can be easily and
quickly transmitted from one individual to another, or to another
ten-thousand or ten-billion. It also tends to be organized
systematically. For example, a history textbook on the founding of
America would take a chronological approach as this would allow
knowledge to build upon itself through a progressive system; in this
case, time.
4. Tacit Knowledge
I should note that tacit
knowledge is a relatively new theory introduced only as recently as the
1950s. Whereas explicit knowledge is very easy to communicate and
transfer from one individual to another, tacit knowledge is precisely
the opposite. It is extremely difficult, if not impossible, to
communicate tacit knowledge through any medium.
5. Propositional Knowledge (also Descriptive or Declarative Knowledge)
Our
last pair of knowledge theories are propositional and non-propositional
knowledge, both of which share similarities with some of the other
theories already discussed. Propositional knowledge has the oddest
definition yet, as it is commonly held that it is knowledge that can
literally be expressed in propositions; that is, in declarative
sentences (to use its other name) or indicative propositions.
Propositional knowledge is not so different from
a priori and
explicit knowledge. The key attribute is knowing that something is
true. Again, mathematical equations could be an example of propositional
knowledge, because it is knowledge
of something, as opposed to knowledge of
how to do something.
The
best example is one that contrasts propositional knowledge with our
next form of knowledge, non-propositional or procedural knowledge. Let’s
use a textbook/manual/instructional pamphlet that has information on
how to program a computer as our example. Propositional knowledge is
simply knowing something or having knowledge
of something. So
if you read and/or memorized the textbook or manual, then you would know
the steps on how to program a computer. You could even repeat these
steps to someone else in the form of declarative sentences or indicative
propositions. However, you may have memorized every word yet have no
idea how to actually program a computer. That is where non-propositional
or procedural knowledge comes in.
Now might be a good time to brush up on how we learn with this