Psychology is bydefinitionaninexactscience.
Thehospitalityindustry, bydefinition,caterstoothers'needs.
Aneconomicstimulusis, bydefinition,temporary.
Bydefinition, and incontrastto thecosmos,humansareshort-lived.
War is, bydefinition,brutal.
This is animmenselycomplexsituationso anysimplesolutionis, bydefinition,wrong.