And since we are interested in the concept of natural selection from a purely evolutionary point of view (recall the introduction to this piece), we don't count selection acting on non-heritable variation as natural selection.    From Wordnik.com.  [Miss Winter Solstice] Reference

On the other hand, as we shall presently show, there is much reason for believing that such acquired characters are in their nature non-heritable.    From Wordnik.com.  [Darwinism (1889)] Reference

Paradoxically, both forms of malnutrition may act through a similar molecular process of modifying DNA, called epigenetics, to cause stable, but non-heritable, changes to the way genes are used.    From Wordnik.com.  [SciDev.Net] Reference

Manusmriti, (dated between 200 BCE and 100 CE), contains laws that codified the caste system, reducing the flexibility of social mobility and excluding the untouchables from society, yet this system was origi - nally non-heritable (Manu Smriti X: 65).    From Wordnik.com.  [Recently Uploaded Slideshows] Reference