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observation
If you're talking about what I think you're talking about, the fact that it is not "scientifically valid" might have a lot to do with it.
Valid
Yes because when you are really tired, it is scientifically possible to be out of energy
Knowledge cames through observation and experimentation. He also was the inventor of inductive reasoning and is considered the Father of Humanism. Another one of his theories was that all knowledge had to be Empirically (scientifically) verified to be valid. He was an English scientist (1561- 1626) and was knighted for his findings.
There is no verifiable historical account of virgin birth and no scientifically valid modern occurrences. Is it believable? I suppose anything is depending on the person. Is it a reasonable belief? No way.
A collentrate is an invertebrate.
The laws are still valid, yes.The laws are still valid, yes.The laws are still valid, yes.The laws are still valid, yes.
Plato's theories are useful as an important part of the history of philosophy. Plato was historically influential, but his theories are not accepted today as being philosophically valid. It has been asserted by many philosophical historians that to read Plato's works is to help understand how he influenced basic human thought.
A scientific theory is a hypothesis that has been repeatedly tested and still seems to be valid. These theories are tested by using the scientific method.
No. I don't believe it still is.
The average person forms theories with little if any intellectual rigor or scientific investigation, hence, those theories are often not valid.