The exponential distribution's memorylessness means past waiting time affects future waiting:

1. Memorylessness is the defining oddity of the exponential distribution. 2. The property is introduced as memorylessness of the exponential distribution. 3. It uses the example where time between customers is exponential with mean two minutes. 4. Having already waited tells you nothing extra about how much longer you will wait. 5. So past waiting time affects future waiting not at all. _Source: OpenStax Introductory Statistics 2e (CC BY 4.0), Ch 5 'Continuous Random Variables', sections 5.1-5.3_