Related Clues:

• See 21-Across
• Accordingly
• 'Tantum ___' (part of a Eucharist hymn)
• Thus
• Proof part
• Start of a conclusion
• Linda Ellerbee's '___ It Goes'
• As a result of
• In the future
• And so
• Cogito-sum divider
• Middle of Descartes' conclusion
• Thence
• From here
• Cogito, --- sum (Descartes' conclusion)