1. RATIONAL
FUNCTION: adjective
- having reason or understanding
- relating to, based on, or agreeable to reason
- reasonable <a rational explanation> <rational behaviour>

Examples:
A. That would be a rational decision.
B. Did her excuse seems rational to you?
C. She seemed perfectly rational to me.
D. It is rational to believe that there are alien beings from outer space?


2. EMPIRICAL
FUNCTION: adjective
- originating in or based on observation and experience <empirical data>
- relying on experience or observation alone often without due regard for system and theory <an empirical basis for the theory>
- capable of being verified or disproved by observation or experiment <empirical laws>


Example:
A. The data we used from our  experiment is empirical data and not based on theory.
B. Medicine focus primarily on the pathology ( disease) and empirical data; nursing examines empirical data while focusing primarily on the whole person and the things that may impact/influence one's life.


* note: what is the difference between a rational proof and an empirical proof?


Rational proof is governed by the rules of logic, considered by many to be the basis of good thinking. Testing ideas through the use of continuous questioning and thoughtful examination.


Empirical proof is proof arising from careful observation of events in nature; proof that forms the basis for scientific discovery.


3. INDUCTION
FUNCTION: noun
-  a formal entry into an organization or position or office
- an electrical phenomenon whereby an electromotive force (EMF) is generated in a closed circuit by a change in the flow of current
- reasoning from detailed facts to  general principles


Example:
A. The scientist used a method of induction to realize that atoms ultimately make up the structure of humans and all life itself.


4. ROADMAP
FUNCTION: noun
- a detailed plan or explanation to guide you in setting standards or determining a course of action. The president said he had a road map for normalizing relations with Vietnam.
- a map showing roads( for automobile travel)


Examples:
A. Plan your route before you leave home and carry road maps with you.


B. Our strategic outline provides a comprehensive and clear road map for moving the school forward to achieve continuous improvement in our educational mission.


5. CAUSATION
FUNCTION: noun
- the act or process of  causing
- a cause
- causality




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