a proof
a proof
It is a proof.
It's called a proof
A counter example is a statement that shows conjecture is false.
A conjecture should be testable. You test it and if it fails the test, it is a false conjecture.
a conjecture is disproved if it is shown to be false. this can be done by providing a single concrete example (e.g. with actual numbers, functions, etc) that shows the conjecture's premise does not necessarily lead to its conclusion. alternatively, a conjecture could be shown to be false (i.e. disproved) by demonstrating that IF it were true then a logical consequence would be a clearly wrong statement (e.g. 2 + 2 =5)
To verify the validity of a logical argument using a proof logic calculator, input the premises and conclusion of the argument into the calculator. The calculator will then use rules of logic to determine if the conclusion logically follows from the premises. If the calculator shows that the argument is valid, it means the conclusion is logically supported by the premises.
A counter-example.
pie tree
hypothesis
It's a counterexample.
Counter example