Descartes' deduction

• Translation of "je suis"
• "___ Legend" (Will Smith film): 2 wds
• "___... Sasha Fierce" (Beyoncé album): 2 wds
• Beginning for this puzzle's five endings
• Sam ___, Dr. Seuss character: 2 wds
• '-- a Rock' (1966 hit)
• Translation of "soy" or "estoy"
• Answer to "Who is?"
• Terse affirmation

Wikipedia Word definitions in Wikipedia
IAM may refer to: