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Science has deeply penetrated all the aspects of human life, we apply scientific methods of research and investigation virtually every time we are dealing with gadgets, domestic appliances, electrical circuits, plumbing, cars etc. These inventions satisfy certain needs and necessities, they perform certain functions, their usage and application is limited to a definite number of operations, there are instruction manuals regulating how certain mechanisms and systems work and what maintenance they require.

Science Meets Real Life
Science has deeply penetrated all the aspects of human life, we apply scientific methods of research and investigation virtually every time we are dealing with gadgets, domestic appliances, electrical circuits, plumbing, cars etc. These inventions satisfy certain needs and necessities, they perform certain functions, their usage and application is limited to a definite number of operations, there are instruction manuals regulating how certain mechanisms and systems work and what maintenance they require. To be more precise, scientific algorithm of thinking stretched even beyond the mentioned sphere of gadgets and appliances – studies, sports, dental and body care, family budget, medical treatment etc – all of them are to be dealt with a proper scientific approach, or at least the generally recognized scientific regulations should not be infringed.
Part I. Scientific method
Scenario 1
The first question that would arise is “why?” or “what is the reason for the switch not to work?” The fact proper that the switch does not perform the expected action draws a close attention to itself and kindles the desire to clear out the situation. So, the first step would be formulated as “What is the cause of the malfunction of the switch?”
The next step is background research, the purpose of which is to define and clear out the problem in more details, to gather data and information on the malfunction. First of all, it is necessary to reassure oneself if the switch really does not work – turning it several times (3 – 7) will definitely manifest the malfunction. Then I would flick the switches in other rooms to make sure the house is disconnected from the electricity. If it is so, my next step would be to have a look outside and check whether the whole district is powered by the electric supply. If the neighbors are also disconnected, then the specialized service should be called, because the problem most probably lies in the high voltage lines. If the households of the neighbor and the street illumination are ok, then the attention would be focused upon my house.
Now it is high time to construct a hypothesis on the basis of the previous “investigation.” Either the electricity cable or meter are damaged, and this damage causes the disconnection.
The next step – testing with an experiment – I would examine the electricity meter and the wire that connects the house to the line. After the breakdown is eliminated, I would flip the switch and, it would manifest the validity of the hypothesis.
The analysis of the results would be made and the link between the absence of light and damage in the cable / meter would be revealed. Thus, the received data turn out to be verifiable (Popper, 2002, p. 23).
Scenario 2
One day I feel a dull pain in my knee, although it is not so hard to ignore and endure, it lasts for some four or five days and does not wear off.
Step number one would be also posing a question what the cause of the pain is. I would then move my leg slowly, I would do several steps in order to check if the pain increases or not. Then I would wait for several days in the hope that the pain would gradually go. In such a way I would make my second step. Having assured that the pain is not going to disappear, I would make a hypothesis that something has happened to my joint or tendon.
The right to perform the experiment would be entrusted to a qualified specialist who would be able to establish a correct diagnosis, and provide a proper treatment of the injury. After getting acquainted with the conclusions of the doctor, I would be able (to a certain extent) to analyze the results and draw a conclusion, although this step will be also performed by the doctor.