Answer:
Can you think of a crime that is punishable if attempted but not punishable if actually committed?
Before Google, we actually had to physically look things up in this building full of knowledge.
I start in little but I end in full, you'll find me in half and complete.
Handy when you need to measure something or run a kingdom.
Temporary evidence of where you've been strolling
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.