These events influence a mind which thereupon perceives certain apparent events which occupy certain periods in the absolute time and occupy certain positions of the absolute space; and the periods and positions occupied by the apparent events bear a determinate relation to the periods and positions occupied by the causal events.
Furthermore definite causal events produce for the mind definite apparent events.

Delusions are apparent events which appear in temporal periods and spatial positions without the intervention of these causal events which are proper for influencing of the mind to their perception.
The whole theory is perfectly logical.

In these discussions we cannot hope to drive an unsound theory to a logical contradiction.

A reasoner, apart from mere slips, only involves himself in a contradiction when he is shying at a _reductio ad absurdum_.

The substantial reason for rejecting a philosophical theory is the 'absurdum' to which it reduces us.