Because some people don't have the guts to say they told a lie because they don't want to face consequences.
Allusion is to refer to something well known or famous so the alussion here would be lordly name. Alluding to lord of godliness.
Spender is the archaeologist for the fourth expedition. He reveres Mars and quickly leaves the crew to explore the planet by himself. He learns to read Martian. Finally, he decides that he should kill off the crew in an effort to preserve Mars.