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diff --git a/src/node_modules/chance/docs/basics/falsy.md b/src/node_modules/chance/docs/basics/falsy.md
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+# falsy
+
+```js
+// usages
+chance.falsy()
+chance.falsy({ pool: [ NaN, undefined ] })
+```
+Return a random falsy value (`false`, `null`, `undefined`, `0`, `NaN`, `''`).
+
+```js
+chance.falsy();
+=> false
+```
+
+The default pool can be changed to better meet the needs:
+
+```js
+chance.falsy({ pool: [ NaN, undefined ] });
+=> NaN
+```
+
+