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@@ -42,6 +42,7 @@ module BusScheme
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                input += "\n" + Readline.readline(INCOMPLETE_PROMPT)
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                retry
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              end
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+             # TODO: persist readline history through sessions
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              Readline::HISTORY.push(input)
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              result
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            rescue Interrupt

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@@ -103,11 +103,8 @@ module BusScheme
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     def method_missing(sym)
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       sym = sym.to_s
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       raise NoMethodError unless sym =~ /^c([ad]+)r/
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+      return send(sym) if sym.length == 3
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       case sym
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-      when 'car'
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-        car
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-      when 'cdr'
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-        cdr
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       when /^ca/
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         send(sym.sub('a', '')).car
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       when /^cd/

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@@ -18,10 +18,8 @@ class Object
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 end
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 # O HAI Booleans.
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-unless defined? Rubinius # TODO: get rid of this conditional. =\
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-  def true.inspect; '#t' end
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-  def false.inspect; '#f' end
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-end
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+class TrueClass; def inspect; '#t' end end
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+class FalseClass; def inspect; '#f' end end
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 module Callable
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   # allows for (mylist 4) => mylist[4]