I understand the little half truths that grease the wheels of social life. Telling a person that their meatloaf wasn't disgusting or that their singing voice doesn't hurt your ears - pretty harmless. Although gently inserting some truth seems to gain me more respect: "I like the passion in your writing but I had trouble understanding the point you were making".
But bare-arsed lies for minimal gain? I've encountered two, recently.
"Your deadline is October 5 because the business deadlines mandate this"
No - you're going on leave and wanted the work out of the way, for your reasons. I found the business deadlines were weeks later. You're a liar.
"We deliberately reduced the number of clients we booked because you didn't have the teams to do the job"
No - you lost one of the clients a week into the project. You were as surprised as we were. You're a liar.
To a person with weak personal standards, telling a bare-faced lie is something of a secret weapon - in the short term. But in the long term you gain a reputation for being a bullshit artist - at best - and possibly worse.
A reputation for honesty and forthrightness is a great asset, and it's important not to trash yours.