Should AND and OR operators support 0 or more arguments (instead of 2 or more)

It makes sense to turn the and and or operators into vararg functions. That would simplify their usage, as shown by this code snippet from this issue:

let conditions = [];
for (const key of filters) {
  conditions.push(eq(product.id, key));
}
return or(...conditions);

This is currently not possible because or expects exactly two arguments. This should be the behavior of or:

• if 0 arguments provided: evaluates to true
• if 1 predicate provided: returns that predicate
• if 2 predicates provided: ors them together
• if 3 or more predicates provided: nested ors

The issue names the TypeScript and and or operators but no files or tests. First locate their definitions and existing operator tests, then verify the requested zero-, one-, two-, and three-plus-predicate cases; clarify the corresponding behavior for and before treating the work as complete.