Value sets in several columns expand to every combination

All 12 scenarios hold

A cell in {curly braces} lists several example values that share one expectation. A scalar parameter expands the row into one invocation per value. A Set parameter receives the whole set as one argument.

A value in a set is a converted value, not the text in the cell. The last two rules say what follows from that. Read them before you write a value set for several spellings of one value.

Each row runs once per combination of values. Three x values and two y values give six invocations per row.