what does tautology

A compound statement is said to be a tautology, if it is always true for all possible combinations of the truth values of its components. A tautology is also called a theorem or a logically valid statement patter..

Being Alive - What does it mean? - Living organisms, like any non-living matter, are composed of some basic elements. The same physical laws such as gravitation, magnetism, thermodynamics etc., also bind living organisms. Yet, living organisms differ from non-living in fundament..

Living organisms, like any non-living matter, are composed of some basic elements. The same physical laws such as gravitation, magnetism, thermodynamics etc., also bind living organisms. Yet, living organisms differ from non-living in fundamental characteristics such as cellular organisation, nutri..

A symbol represents one atom of an element. Example: H stands for one atom of hydrogen. However, if a symbol has a subscript and a superscript, as given along side, then more in formation can be derived from it...

Does a square have a line of symmetry? => Yes or No..

Does the transformation appear to be an isometry? => no or yes or cannot be determined..

Which solid does not have any flat face? => pyramid or rectangular prism or sphere or cube..

Which of the figures does not have a line of symmetry? => Figure 1 or Figure 2 or Figure 3 or Figure 4..

Which variation does the graph model? => cannot be determined or direct variation or neither direct nor inverse or inverse variation..

Which of the following does not represent 32? => 40 - 8 or 20 + 10 - 2 or 30 + 2 or 25 + 7..