• Theoretically, this is because there is no air in the perfect vacuum that is space - ergo, no possibility for sound to travel and therefore, no scream.
• I'd patiently explain that the story was about a rotten man who turns good; ergo, we had to establish his rottenness at the beginning.
• Since he does the whole judge/jury/executioner thing, everybody's out to get him, ergo, he has to make himself as scarce as possible.

Synonyms