Wikipedia:Obversion

To obvert an edit is to BOLDly restore a proposed contribution by undoing a Reversion of it, sometimes also called the "un-revert", "de-revert", or "counter-revert". A cogent argument in the edit summary can function as acceptable Discussion, and obversion is a justifiable response to Status quo stonewalling

Use of the Term
The term was newly coined upon the numismatic analogy in order to avoid equivocation in use of the term "revert", while clarifying the parties to Content dispute. The practice of obverting may simplify scholarly discourse over multiple drafts, encourage a balance between Bold persistence and outright EDITWAR, prevent false accusations of the latter, and assist in their adjudication when these occur. An obversion with refinements and an edit summary that answer the objection given in the primary reverter's edit summary, is a CIVIL manner of developing.

We were forced to adopt this idiom by a long, tortured, and hopelessly ironic RFC discussion on the TENDENTIOUSness of reverting without DISCUSSion, on the BRD essay talk page, of all places.

We agreed that obverting and restoring may be an appropriate response to WP:Status quo stonewalling, and that talk page discussion is not always required during good-faith content dispute, although discussion in the edit-summary field is required.

How to obvert
From the history page, just hit the "undo" link next to a prior edit, as with any other reversion. The particularity of an obversion is that the prior edit is itself a reversion, making this operation a "restoration" of a positive contribution rather than mere maintenance of the status quo ante. Obversion can be unwarranted or tendentious, just like the broader class of reversions in general, or it can be warranted and virtuous, depending on the circumstance. How to do it virtuously is the question, and its answered here:

Editorial opinions and commentary
It is important that you obvert carefully. Otherwise, you could start an edit war. Instead of obverting the whole revert, just revert the parts that you think are mistaken.