Related Clues:

• Have trouble deciding
• 'Use your head!'
• 'Concentrate!'
• Opine
• Suspect
• Cerebrate
• Use one's noodle
• Get lost in a brown study
• Meditate
• Wrestle
• Have a hellish time deciding
• Ruminate
• Struggle painfully (over), as a decision
• 47 Down motto
• IBM motto