sets in that emporium, its brighter side of cricket goods, of pads and balls and stumps. Out of the window one peeped at the more exterior world, the High Street in front, the tailor’s garden, the butcher’s yard, the churchyard and Bromley church tower behind; and one was taken upon expeditions to fields and open places. This limited world was peopled with certain familiar presences, mother and father, two brothers, the evasive but interesting cat, and by intermittent people of a livelier but more transient interest, customers and callers.
Such was my opening world of fact, and each day it enlarged and widened and had more things added to it. I had soon won my way to speech and was hearing of facts beyond my visible world of fact. Presently I was at a Dame’s school and learning to read.
From the centre of that little world as primary, as the initiatory material, my perception of the world of fact widened and widened, by new sights and sounds, by reading and hearing descriptions and histories, by guesses and inferences; my curiosity and interest, my appetite for fact, grew by what it fed upon, I carried on my expansion of the world of fact until it took me through the mineral and fossil galleries of the Natural History Museum, through the geological drawers of the College of Science, through a year of dissection and some weeks at the astronomical telescope. So I built up my conceptions of a real world out of facts observed and out of inferences of a nature akin to fact, of a world immense and enduring, receding interminably into space and time. In that I found myself placed, a creature relatively infinitesimal, needing and struggling. It was clear to me, by a hundred considerations, that I in my body upon this planet Earth, was the outcome of countless generations of conflict and begetting, the creature of natural selection, the heir of good and bad engendered in that struggle.
So my world of fact shaped itself. I find it altogether impossible to question or doubt that world of fact. Particular facts one may question as facts. For instance, I think I see an unseasonable yellow wallflower from my windows, but you may dispute that and show that it is only a broken end of iris leaf accidentally lit to yellow. That is merely a substitution of fact for fact. One may doubt whether one is perceiving or remembering or telling facts clearly, but the persuasion that there are facts, independent of one’s interpretations and obdurate to one’s will, remains invincible.
1.4. Scepticism of the Instrument.
At first I took the world of fact as being exactly as I perceived it. I believed my eyes. Seeing was believing, I thought. Still more did I believe my reasoning. It was only slowly that I began to suspect that the world of fact could be anything different from the clear picture it made upon my mind.
I realised the inadequacy of the senses first. Into that I will not enter here. Any proper text book of physiology or psychology will supply a number of instances of the habitual deceptions of sight and touch and hearing. I came upon these things in my reading, in the laboratory, with microscope or telescope, lived with them as constant difficulties. I will only instance one trifling case of visual deception in order to lead to my next question. One draws two lines strictly parallel; so
(two horizontal and parallel lines.)
Oblique to them one draws a series of lines; so
(a series of parallel and closely-spaced lines drawn through each horizontal line, one series (top) sloping to the right, the other (bottom) to the left)
and instantly the parallelism seems to be disturbed. If the second figure is presented to any one without sufficient science to understand this delusion, the impression is created that these lines converge to the right and diverge to the left. The vision is deceived in its mental factor and judges wrongly of the thing seen.
In this case we are able to measure the distance of the lines, to find how the main lines looked before the cross ones were drawn, to bring the deception up against fact of a different sort and so correct the mistake. If the ignorant observer were unable to do that, he might remain permanently under the impression that the main lines were out of parallelism. And all the infirmities of eye and ear, touch and taste, are discovered and checked by the fact that the erroneous impressions presently strike against fact and discover an incompatibility with it. If they did not we should never have discovered them. If on the other hand they are so incompatible with fact as to endanger the lives of the beings labouring under such infirmities, they would tend to be eliminated from among our defects.
The presumption to which biological science brings one is that the senses and mind will work as well as the survival of the species may require, but that they will not work so very much better. There is no ground in matter-of-fact experience for assuming that there is any more inevitable certitude about purely intellectual operations than there is about sensory perceptions. The mind of a man may be primarily only a food-seeking, danger-avoiding, mate-finding instrument, just as the mind of a dog is, just as the nose of a dog is, or the snout of a pig.
You see the strong preparatory reason there is in this view of life for entertaining the suppositions that:—
The senses seem surer than they are.
The thinking mind seems clearer than it is and is more positive than it ought to be.
The world of fact is not what it appears to be.
1.5. The Classificatory Assumption.
After I had studied science and particularly biological science for some years, I became a teacher in a school for boys. I found it necessary to supplement my untutored conception of teaching method by a more systematic knowledge of its principles and methods, and I took the courses for the diplomas of Licentiate and Fellow of the London College of Preceptors which happened to be convenient for me. These courses included some of the more elementary aspects of psychology and logic and set me thinking and reading further. From the first, Logic as it was presented to me impressed me as a system of ideas and methods remote and secluded from the world of fact in which I lived and with which I had to deal. As it came to me in the ordinary textbooks, it presented itself as the science of inference using the syllogism as its principal instrument. Now I was first struck by the fact that while my teachers in Logic seemed to be assuring me I always thought in this form:—
“M is P,
S is M,
S is P,”
the method of my reasoning was almost always in this form:—
“S1 is more or less P,
S2 is very similar to S1,
S2 is very probably but not certainly more or less P.
Let us go on that assumption and see how it works.”
That is to say, I was constantly reasoning by analogy and applying verification. So far from using the syllogistic form confidently, I habitually distrusted it as anything more than a test of consistency in statement. But I found the textbooks of logic disposed to ignore my customary method of reasoning altogether or to recognise it only where S1 and S2 could be lumped together under a common name. Then they put it something after this form as Induction:—
“S1, S2, S3, and S4 are P
S1 + S2 + S3 + S4 + … are all S
All S is P.”
I looked into the laws of thought and into the postulates upon which the syllogistic logic is based, and it slowly became clear to me that from my point of view, the point of view of one who seeks truth and reality, logic assumed a belief in the objective reality of classification of which my studies in biology and mineralogy
