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Yes
true
useful
This is not always true.
No, not always. It depends on if the original biconditional statement is true. For example take the following biconditional statement:x = 3 if and only if x2 = 9.From this biconditional statement we can extract two conditional statements (hence why it is called a bicondional statement):The Conditional Statement: If x = 3 then x2 = 9.This statement is true. However, the second statement we can extract is called the converse.The Converse: If x2=9 then x = 3.This statement is false, because x could also equal -3. Since this is false, it makes the entire original biconditional statement false.All it takes to prove that a statement is false is one counterexample.
Contrapositive
The negation of always is sometimes or never.
No, it is not.
I am not sure but NOT is an adverb of negation. Examples: No Not Never Don't
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Osmosis always involves the movement of water. During osmosis water will move in and out of the cell or membrane.
One statement about gravity that is always true is that it is a force of attraction between objects with mass.
A Tautology is any logical statement that always results in True. Example, the statement - "Malaria is dangerous" is always true.A Fallacy is a statement that always results in False. Example - "Toxic waste is easy to store" - is always falseThere are exactly opposite of each other.
always true
always true
There is choice. Depending on the difference in meaning, we may say " She usually does not go to school," or " She does not usually go to school."
No.