Append the following text to the rule Probulator Operation as a new paragraph.

If a Researcher is instructed by the rules to use the Probulator to determine an outcome or outcomes but no mention of the material to use has been made, the Researcher is first to Use a Material that has that Function or Functions in its list of Functions; and in cases where a single Material does not have all of the Functions that the Researcher is to determine an outcome for, or in cases where the Researcher chooses to use a different legal Material for one or more Functions, the Researcher can Use as many Materials as necessary to complete their instruction.