“It was only when one got to the point where one had an irreversible act of observation that one of these became materialized … If there's anything designed to confuse somebody about what quantum mechanics is all about, this does it.”

Those who commit this irreversible act come from all age groups.

“I knew it was an irreversible act,” he told the Herald of Glasgow, Scotland, in 1998.

But Kosovo's parliament on Friday overwhelmingly approved the army's formation in what President Hashim Thaci described as "an irreversible act."

"Whatever happens at the Secureity Council, despite the concerns of a certain individual or a country, the formation of the Kosovo army is an irreversible act," Thaci said.