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diff --git a/source/lang/booleanvariables.rst b/source/lang/booleanvariables.rst
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--- a/source/lang/booleanvariables.rst
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-.. highlight:: cpp
-
-.. _lang-booleanvariables:
-
-Booleans
-========
-
-A **boolean** holds one of two values, :ref:`true
-<lang-constants-true>` or :ref:`false <lang-constants-false>`.  On a
-Maple, each boolean variable has type ``bool``.
-
-.. warning::
-
-   On an Arduino, the type ``boolean`` is also provided.  While the
-   Maple also has this type for compatibility, **its use is strongly
-   discouraged**.  The ``bool`` type is a standard part of C++, while
-   ``boolean`` is a non-standard extension that serves no purpose.
-
-Example
--------
-
-::
-
-    int ledPin = 13;      // LED on pin 13
-    int switchPin = 12;   // momentary switch on 12, other side connected to ground
-
-    // running is a boolean variable:
-    bool running = false;
-
-    void setup() {
-      pinMode(ledPin, OUTPUT);
-      pinMode(switchPin, INPUT);
-      digitalWrite(switchPin, HIGH);      // turn on pullup resistor
-    }
-
-    void loop() {
-      if (digitalRead(switchPin) == LOW) {
-        // switch is pressed - pullup keeps pin high normally
-        delay(100);                        // delay to debounce switch
-        running = !running;                // toggle running variable
-        digitalWrite(ledPin, running)      // indicate via LED
-      }
-    }
-
-See also
---------
-
-
--  :ref:`Boolean constants <lang-constants-bool>`
--  :ref:`Boolean operators <lang-boolean>`
--  :ref:`Variables <lang-variables>`
-
-
-.. include:: cc-attribution.txt