Another mode of verbal misleading is equivocation or a play upon words; and it is defended on the theory that to lie is to use words in a sense which they will not bear. But an equivocator uses them in a received sense, though there is another received sense, and therefore, according to this definition, he does not lie.
Others say that all equivocations are, after all, a kind of lying,—faint lies or awkward lies, but still lies; and some of these disputants infer, that therefore we must not equivocate, and others that equivocation is but a half-measure, and that it is better to say at once that in certain cases untruths are not lies.
Others will try to distinguish between evasions and equivocations; but though there are evasions which are clearly not equivocations, yet it is very difficult scientifically to draw the line between the one and the other.
To these must be added the unscientific way of dealing with lies:—viz. that on a great or cruel occasion a man cannot help telling a lie, and he would not be a man, did he not tell it, but still it is very wrong, and he ought not to do it, and he must trust that the sin will be forgiven him, though he goes about to commit it ever so deliberately, and is sure to commit it again under similar circumstances. It is a necessary frailty, and had better not be thought about before it is incurred, and not thought of again, after it is well over. This view cannot for a moment be defended, but, I suppose, it is very common.
I think the historical course of thought upon the matter has been this: the Greek Fathers thought that, when there was a justa causa, an untruth need not be a lie. St. Augustine took another view, though with great misgiving; and, whether he is rightly interpreted or not, is the doctor of the great and common view that all untruths are lies, and that there can be no just cause of untruth. In these later times, this doctrine has been found difficult to work, and it has been largely taught that, though all untruths are lies, yet that certain equivocations, when there is a just cause, are not untruths.
Further, there have been and all along through these later ages, other schools, running parallel with the above mentioned, one of which says that equivocations, &c. after all are lies, and another which says that there are untruths which are not lies.
And now as to the "just cause," which is the condition, sine quâ non. The Greek Fathers make it such as these, self-defence, charity, zeal for God's honour, and the like.
St. Augustine seems to deal with the same "just causes" as the Greek Fathers, even though he does not allow of their availableness as depriving untruths, spoken on such occasions, of their sinfulness. He mentions defence of life and of honour, and the safe custody of a secret. Also the great Anglican writers, who have followed the Greek Fathers, in defending untruths when there is the "just cause," consider that "just cause" to be such as the preservation of life and property, defence of law, the good of others. Moreover, their moral rights, e.g. defence against the inquisitive, &c.