deletions | additions       diff --git a/Social_costs_socially_optimal_level__.md b/Social_costs_socially_optimal_level__.md  index a45e78e..836745b 100644  --- a/Social_costs_socially_optimal_level__.md  +++ b/Social_costs_socially_optimal_level__.md 
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  Now there is debate between the economist and the politics lecturer about slippery slopes versus graphs (personally I'm silent here).  Now we're building a ladder on the iteration of it the graph  about carbon tax, which kind of reminds me of a 2-D version of a double helix but that might be too meta. It uses 2 dollar increments.