The belief that wool and linen "cancel each other out" comes from a biblical law that prohibits wearing garments made from a mix of these two materials (Deuteronomy 22:11). This rule doesn’t have a clear scientific explanation, but is understood in religious or symbolic terms in some cultures.

From a scientific or physical perspective, there’s no inherent property of wool and linen that causes them to "cancel" each other out or negatively interact. Functionally, combining them wouldn’t significantly affect their insulating or moisture-wicking abilities. However, the texture or properties of the mix might be less desirable to some.

The reason they don’t "amplify" each other could simply be that these two materials have different characteristics (wool is warmer, linen is cooler), so they don’t complement each other synergistically. There’s no physical phenomenon of "cancellation" involved.