WEBVTT 00:00:00.710 --> 00:00:03.160 That was a trick question. We wanted to 00:00:03.160 --> 00:00:06.240 emphasize that affordances and signifiers are quite different 00:00:06.240 --> 00:00:10.530 concepts. They're independent. Affordances are the possible actions 00:00:10.530 --> 00:00:13.270 an actor can take upon an item in question. 00:00:13.270 --> 00:00:16.610 Signifiers are the signal. Signal conveyed to the 00:00:16.610 --> 00:00:19.710 person about the possible actions. Something can be 00:00:19.710 --> 00:00:22.930 in affordance or a signifier or both or 00:00:22.930 --> 00:00:25.790 neither. It could even be a signifier of something 00:00:25.790 --> 00:00:28.520 but not afford doing it. The correct 00:00:28.520 --> 00:00:31.300 answers to the questions therefore are, the barbed 00:00:31.300 --> 00:00:33.850 wire. Yeah, the barbs on the barbed wire, 00:00:33.850 --> 00:00:38.270 they're both signifiers and anti-affordances. The danger sign, 00:00:38.270 --> 00:00:40.700 yeah, that's a signifier. The site of the 00:00:40.700 --> 00:00:43.530 high voltage line? Well, that's a signifier to 00:00:43.530 --> 00:00:46.890 some people, but meaningless to others. And a 00:00:46.890 --> 00:00:51.660 very high voltage itself is an invisible affordance. 00:00:51.660 --> 00:00:54.285 It doesn't afford getting near. You'll kill yourself, 00:00:54.285 --> 00:00:56.560 because within, but for a high voltage, if 00:00:56.560 --> 00:00:59.080 you're within one meter about three feet, it 00:00:59.080 --> 00:01:02.070 can be fatal. But there's nothing to see. It's 00:01:02.070 --> 00:01:05.410 invisible, so the very high voltage is actually 00:01:05.410 --> 00:01:10.470 at invisible anti-affordance. The doorknob. It's a partial 00:01:10.470 --> 00:01:13.930 signifier and an affordance. The signifier is only 00:01:13.930 --> 00:01:16.960 partial because it indicates where to do the action, 00:01:16.960 --> 00:01:21.780 you know, pushing, or pulling, or turning, but not which action to do.