The lecturer was welcoming to ideas from the group and answered a series of philosophical questions. I chose to undertake this course purely for pleasure, and was thoroughly impressed with the overall presentation and construct of it. Robert, the tutor, knew his subject well and involved the group at all points, encouraging us to think for ourselves. He did so with a relaxed manner and a nice sense of humour. All in all, a great experience which stimulated my thinking on this matter.
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This question is precisely why the film Inception ends in doubt over whether Cobb is still dreaming or awake. They use them so that they cannot be deceived about being in a dream by someone else. Only in the real world will a totem fall the way it is supposed to fall, for example. Therefore when the totem is thrown, spun, or held, its owner can tell if they are in a dream-state or in reality. When Cobb walks into his house at the end of the film, he spins his totem, a spinning top, then proceeds to walk outside to greet his children.
A sign that he is in a dream would be that the top continued spinning forever. We are left seeing the totem spinning on the table — then the film cuts to the credits. We are not sure if the totem spins forever, or falls. Even if the spinning top had toppled over at the end of the film, it would still be impossible to tell whether Cobb was dreaming, since the original state where he created this totem and defined its behaviour might itself have been a dream… This ending is perfect, as humans are still searching for the answer to this question.
For the idea to work, the dreamer must not realise that the idea has been implanted. A sub-plot of the movie is that Mr and Mrs Cobb once got so stuck deep inside layers of the dream-world that they grew old in their dream-life. Unfortunately, when she awoke, with that idea still in her mind she thought she was still dreaming.
So, he realized, even though he felt awake, he could still be dreaming. Indeed, for all he knew, the entire world might not even exist. Descartes did finally find something he thought was undoubtable: the fact that he was doubting. For what is the truth, many reasons we prove that all the appearances are not true. And first, the feeling itself does not deceive us about its proper object, but the sensible idea is not the same as sensation. Then, one can rightly wonder we are talking about are those in doubt on questions like these: The magnitudes and colors are they really as they appear to those who have strayed or such see that those who are near?
Are they really as they appear healthy men, or as seen by the sick? Gravity is what it seems to men of low weight complexion, or what is for strong men? The truth is it what we see in sleep, or what we see during the day? Nobody, of course, believes that there is on these points the slightest uncertainty.
Moreover, and this Plato who made the remark, the opinion of the ignorant certainly does not equal authority to the physician when it comes to know, for example, if the patient recovers or not recover health.
Finally, the testimony of one direction on an object that is foreign, or even that comes close to his own purpose, has no equal in value to his testimony on his own object, the object is actually hers. This is the view that judges and not the color of taste is the taste that flavors judge, not the view. Never did any of these senses, at the same time, when applied to the same object, tells us that this object has and has not both such property.
I go further still. You can not dispute the testimony of sense, because different times he disagrees with himself, he must send the accused to be experiencing the sensation.
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