Verb

(realis)

*{{quote-magazine, date=2013-06-07, author= Ed Pilkington

, volume=188, issue=26, page=6, magazine=(The Guardian Weekly) , title= ‘Killer robots’ should be banned in advance, UN told , passage=In his submission to the UN, [Christof] Heyns points to the experience of drones. Unmanned aerial vehicles were intended initially only for surveillance, and their use for offensive purposes was prohibited, yet once strategists realised their perceived advantages as a means of carrying out targeted killings, all objections were swept out of the way.}}

Verb

(en verb)

To detect with the senses, especially with the eyes.

* {{quote-book

, year=1875 , author=Jules Verne , title=The Survivors of the Chancellor , chapter=1 citation , passage=Meanwhile the brig had altered her tack, and was moving slowly to the east. Three hours later and the keenest eye could not have discerned her top-sails above the horizon.}}

To perceive, recognize, or comprehend with the mind; to descry.

* {{quote-book

, year=1842 , author=Charles Dickens , title=American Notes for General Circulation citation , passage=If they discern' any evidences of wrong-going in any direction that I have indicated, they will acknowledge that I had reason in what I wrote. If they ' discern no such thing, they will consider me altogether mistaken.}}

To distinguish something as being different from something else; to differentiate.

* {{quote-book

, year=1651 , author=Thomas Hobbes , title=Leviathan citation , passage=The severity of judgement, they say, makes men censorious and unapt to pardon the errors and infirmities of other men: and on the other side, celerity of fancy makes the thoughts less steady than is necessary to discern exactly between right and wrong.}}

He was too young to discern right from wrong.

To perceive differences.