[Free online image]
A sample text-based worksheet for self-editing practices . . . was last week’s forecast. So, here comes an opportunity to practice proofreading [Source: “Free Weekly Proofreading Exercise” at http://www.proofreading-course.com]:
“[ . . . ] we see is constantly changing in shape as we move about the room; so that here again the senses seem not to give us the truth about the table itself, but only about the appearance of the table.
Similar difficulties arise when we consider the sense of touch. It is true that the the table always gives us a sensation of hardness, and we feel that it resists pressure. But the sensation we obtain depends upon how hard we press the table and also upon what part of the body we press with; thus the various sensations due to various pressures or various parts of the body cannot be supposed to reveal directly any definite property of the table, but at most to be signs of some property which perhaps causes all the sensations, but is not actually apparent in any of them. And the same applies still more obviously to the sounds which can be elicted by rapping the table.
Thus it becomes evident that the real table, if there is one, is not the same as what we immediately experience by sight or touch or hearing. The real table, if there is one, is not
immediately known to us at all, but must be an inference from what is immediately known. Hence, two very difficult questions at once arise; namely, (1) Is there a real table at all? 2) If so, what sort of object can it be? It will help us in considering these questions to have a few simple terms of which the meaning is definite and clear. Let us give the name of ‘sense-data’ to the things that are immediately known in sensation: such things as colours, sounds, smells, hardnesses, roughnesses, and so on. We shall give the name ‘sensation’ to the experience of being immediately aware of these things.”
Next week: The corrections