"....... Most people would agree that telling deliberate lies is wrong, except perhaps in certain special situations where more harm will be done by telling the truth. Even the most truthful people probably tell a good many more lies that might be regarded as semantic lies; their use of words contains some measure of falsehood, more or less deliberate."
The idea which the first part of the passage mentions is
(a) agreement about telling lies.
(b) disagreement about telling lies.
(c) disagreement about telling the truth.
(d) disagreement about the harm in telling the truth.