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The method of character for the sentence, "His tail twitched rhythmically as he observed the workers in the field," is indirect character's thoughts. This is a way of showing information about a character through his thoughts.
One of the alternative manifestations of a character observed as present in an organism ~ value of variable
To form a hypothesis is to guess at the possible cause or explanation for some observed phenomenon. A hypothesis can become a theory if it is confirmed by additional observation or experimentation. Until it is confirmed, it is just a guess.
Crookes observed the first an isotope of protactinium but neglected this.Fajans and Gohring discovered another isotope and confirmed protactinium as new element.
The exact wording of the first article of the Magna Carta is: First, that we have granted to God, and by this present charter have confirmed for us and our heirs in perpetuity, that the English Church shall be free, and shall have its rights undiminished, and its liberties unimpaired. That we wish this so to be observed, appears from the fact that of our own free will, before the outbreak of the present dispute between us and our barons, we granted and confirmed by charter the freedom of the Church's elections - a right reckoned to be of the greatest necessity and importance to it - and caused this to be confirmed by Pope Innocent III. This freedom we shall observe ourselves, and desire to be observed in good faith by our heirs in perpetuity. We have also granted to all free men of our realm, for us and our heirs for ever, all the liberties written out below, to have and to keep for them and their heirs, of us and our heirs
All elements from atomic number 84 (Polonium - Po) and onwards are radioactive, although ones that have not been observed cannot be confirmed.
The effects of gravity on light waves were observed, during a solar eclipse, on May 29, 1919. Einstein's prediction was confirmed.
According to what MJ himself confirmed, he picked up the dancestep from street dancers he observed outside a hotel where he was staying. Source: VH1 Music Channel BR Hussain
The more you have observed other people, the more you are able to write characters that are realistic.
Natural satellites have been observed in orbit around every known planet in the solar system EXCEPT Mercury and Venus.
Murray Gell-Mann and George Zweig (working independently) actually theorized quarks in 1964. The first of these six fundamental particles was observed (discovered or confirmed, if you like) in 1968, and the last was observed in 1995.
Black Dwarfs are still theoretical bodies in the Universe. Belief and scientific observations are two different things. In theory, they will exist, but until one is observed, there existence can not be confirmed. See related question