good reason
- justificationReason proving rightness
- rationaleStated basis for action
- motiveReason for action
- causeWhat produces an effect
- explanationStatement making something clear
purpose · logic · grounds · basis · excuse · valid · legitimate · compelling · convincing · persuasive · why · because · defense · warrant · argument · sensible · sound · fair
justification quality
good reasonlame excuse
faulty reasoning · flawed logic · rationalization · sophistry
presence of justification
good reasonno reason
no basis · without cause · groundlessness · baselessness · whim