What is a minimal pair?

Definition
	A minimal pair is two words that differ in only one sound.

Examples (English)
	Sounds which differ: /p/ and /b/
	[lQp] ‘lap’ [lQb] ‘lab’

Examples (Cashinahua, Peru/Brazil)
	Sounds which differ: /t/ and /d/
	[taka] 'liver' [daka] 'to rest'