Related Clues:

• Now's companion
• If's partner, in logic
• Thereupon
• Thus, in mathematical proofs
• Thus, to a logician
• Cogito follower
• Partner of 59 Across
• And so . . .
• Apt rhyme for "so"
• '__ what?'
• "___ again ..." ("on the other hand ...")
• Descartes' adverb
• 'All righty ___!'
• ''If so . . .''
• "After that ..."