In the second place, the word acquaintance is designed to emphasise, more than the word presentation, the relational character of the fact with which we are concerned.
"Mysticism and Logic and Other Essays"
Bertrand Russell
This means, so far as practical working out is concerned, that we adopt the relational theory; for in practice the refusal to assume points and instants has the same effect as the denial of them.
"Our Knowledge of the External World as a Field for Scientific Method in Philosophy"
Bertrand Russell
If a relational theory of instants is constructed, in which an "instant" is defined as a group of events simultaneous with each other and not all simultaneous with any event outside the group, then if our resulting series of instants is to be compact, it must be possible, if x wholly precedes y, to find an event z, simultaneous with part of x, which wholly precedes some event which wholly precedes y.
"Our Knowledge of the External World as a Field for Scientific Method in Philosophy"
Bertrand Russell