1903.] STONEY—UNIVERSE OF REAL EXISTENCES. a igs: 
thoughts. This supposed existence, if there is occasion to speak 
of it, will be called the man’s spirit ; but his #zvd, at a given time, 
will mean simply ¢he fotality of a certain definite group of thoughts 
at that time. 
CHAPTER 6. THE POSTULATES OF THE PRESENT INQUIRY. 
We are now in a position to present a list of the postulates upon 
which our further progress will be built. Almost all men are agreed - 
that these beliefs are fundamental, and most men would add con- 
siderably to the list. The very short list here set forth has been 
obtained by excluding from the longer list all that on trial were 
found not to be necessary for our inquiry. 
Postulates. 
First Belief.—That my present thoughts exist. 
Second Belief.—That my remembered thoughts have existed. 
These two beliefs involve a third, viz. : 
Third Belief.—That time relations exist. 
Fourth Belief.—That minds more or less resembling mine exist 
in my fellow-men and in some other animals. 
Observation.—By intercourse between my mind and the minds 
of my fellow-men I learn that they experience sensations which are 
closely related ‘to those that present themselves as a part of my 
mind. Whence, and from much other evidence, I infer: 
Fifth Beliefi—That my sensations and theirs have their source 
in some existing thing or things which are not any part of my own 
present or past thoughts. 
Bishop Berkeley entertained this belief as emphatically as other 
men. He held that sensations are produced in human minds by 
acts of will of a ‘‘ governing spirit.’’ 
Sixth Supposition.—Another belief is freely made use of in the 
present essay, viz.: that my organs of sense and parts of my brain 
are in some way associated with the introduction of sensations into 
my group of thoughts. 
This belief is, however, not a necessary postulate of the investi- 
gation. The argument can be stated in language which does not 
