Washed, natural and honey are useful broad descriptions of how coffee fruit material is handled and the seeds are dried. Wet hulling concerns another important timing distinction. The source places these alongside fermentation-led terms to explain the variety of product labels now encountered by buyers.
The categories can overlap. A coffee described as anaerobic may also be washed or natural, and a yeast-related account does not replace the need to explain later handling. Ask what is known about the producer's actual sequence rather than assuming every label represents a universally standardised method.
Compare identified lots using a repeatable brew, noting sweetness, acidity, texture and finish. Processing can help explain differences, but it is one factor among variety, growing conditions, storage and roast. A good guide makes terminology clearer without making a fixed flavour promise for every method.

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A good question can make a better brew.