In the 1960s, the terms “spelunking” and “spelunker” began to be considered déclassé among experienced enthusiasts. They began to convey the idea of inexperienced cavers, using unreliable light sources and cotton clothing. In 1985, Steve Knutson (editor of NSS publication American Caving Accidents) made the following distinction:
…Note that I use the term ‘spelunker’ to denote someone untrained and unknowledgeable in current exploration techniques, and ‘caver’ for those who are.
This sentiment is exemplified by bumper stickers and t-shirts displayed by many cavers: “Cavers rescue spelunkers”.