papasmoke:

In her essay Tik Tok the great philosopher Ke$ha declared that ‘the party don’t start till I walk in.’ which is clearly meant to convey that any recreational gathering is not truly a party until Ke$ha herself arrives.

But what if Ke$ha were to leave the party for some period of time only to then walk in again? This paradoxical scenario in which a party must simultaneously already exist and not exist yet is known as Ke$ha’s Quantum Party and has stumped theoretical physicists for decades.