Since I can never knowingly speak the truth, all I can do is use every possible

Since I can never knowingly speak the truth, all I can do is use every possible means of guaranteeing that I speak a falsehood.

Yes, truthful speech is expensive. So is the damage caused by untrue speech.

So, if someone will not undertake this effort, nor warranty his speech, then what are we to assume?

We have options:

1) he cares not for the damage done (a hazard)

2) he intends to cause damage (cause harm)

3) he exports risk because of his failure onto others (theft)

None of them are good.