If you can't lie, you can't conceal your true intentions from people, which is often necessary.
No.
It's not often necessary.
I have no desire to conceal my intentions.
I guess you never bought a used car?
I have.
I said, "I hate haggling games. I like this car, and this is what I am willing to pay for it."
If it is less than what they were asking, they had to make a decision.
If thery were unwilling to take what I was offering, I didn't buy it.
It was pretty much as simple as that.
I see no reason to lie.
Never negotiated a lower price at a yard sale, or for a house?
Yes.
See above.
Never told your wife those jeans don't make her butt look big?
No.
I would say, "The other ones looked better," and she appreciates that.
I also don't lie for common courtesy. Regardless, it is not necessary for survival.
My sister is in the hospital right now, actually - she got hit by a car two weeks ago and it messed her up pretty bad.
When I see her, I don't lie. I will make a point of acknowledging the positive, "Wow, that wound is healing quickly", but I don't lie. I honestly and earnestly show my compassion and love for her. I try to make her smile and I listen to her when she is upset about it. I think that does a world more good than placating her with obvious platitudes.