Related Clues:

• Axioms
• Goes against the grain, perhaps
• We hold these truths to be self-evident
• Toothed tools
• Tooth holders
• First principles
• Makes the cut, in a way
• Wise observations
• They may be big fellers
• Obvious statements, possibly
• Tree cutters
• The starts of this puzzle's six longest answers are types of them
• Hardware store section
• What all good fellers need
• Commonly used saws