Iron clubs from the 17th to the early 19th century are rare because feather-filled balls could explode if hit inexpertly.

WSJ: Collecting: Mementos of a Gentleman's Game | The Jaime Ortiz-Pati?o Collection

Judicial regulation of the environment would ask legal experts to inexpertly answer scientific questions and would create a fractured regulatory framework, crippling interstate and international businesses.

FORBES: DOJ To SCOTUS: Climate Change Is A Political Issue