Discussion
The functional dependency R → S means that the value of S can be determined when we are given a value of R.
Answer: A
Correct answer: True
This is the definition. R → S asserts that each value of R is associated with exactly one value of S, so knowing R is enough to determine S. R is the determinant, S the dependent attribute. It is a statement about the meaning of the data, so no set of sample rows can prove it - a single counterexample refutes it.
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