Logical connection hidden in eight puzzle answers

Question:

Answer:

ERGO

Length:

Similar Crossword Questions:

Word for turkey hidden in 11 answers of this puzzle
Word hidden in this puzzle's longest answers
Word hidden backwards in this puzzle's eight longest answers
A different one is hidden in each of this puzzle's seven longest answers
Human fingerprint, and what's hidden in five puzzle answers
Very distant or different (and a hint to what's hidden among the Across answers, in their logical order, from top to bottom)
Picnic serving, and when divided properly, a hint to a hidden feature of six pairs of puzzle answers
Rap sheet letters hidden in this puzzle's longest answers
Structure of this puzzle's theme, hidden in five answers
Brief version of this puzzle's title hidden in eight long puzzle answers
Secret retreat hidden in this puzzle's nine longest answers
Featured article hidden in this puzzle's nine longest answers
They're hidden in this puzzle's nine longest answers
Call hidden in this puzzle's eight longest answers that's apt for May Day?
Item hidden in each of the 15-letter answers in this puzzle
Their names are hidden in eight answers in this puzzle
Meal blessing that's 'mixed' and hidden in seven answers in this puzzle
They're hidden in seven long answers in this puzzle
"Field" hidden in five puzzle answers
Entertainer (1938-2007) whose first name is hidden in eight puzzle answers including this one
Business "meeting" hidden in nine puzzle answers
They're hidden in this puzzle's seven longest answers
They're hidden in this puzzle's eight longest answers
Appliances hidden in seven answers in this puzzle
Three-letter combinations hidden in this puzzle's six other longest answers