diff --git a/builtin/core.wren b/builtin/core.wren
index a3722dd9..2ee9951d 100644
--- a/builtin/core.wren
+++ b/builtin/core.wren
@@ -1,9 +1,25 @@
 class Sequence {
+  all(f) {
+    var result = true
+    for (element in this) {
+      result = f.call(element)
+      if (!result) return result
+    }
+    return result
+  }
+
+  any(f) {
+    var result = false
+    for (element in this) {
+      result = f.call(element)
+      if (result) return result
+    }
+    return result
+  }
+
   contains(element) {
     for (item in this) {
-      if (element == item) {
-        return true
-      }
+      if (element == item) return true
     }
     return false
   }
@@ -19,9 +35,7 @@ class Sequence {
   count(f) {
     var result = 0
     for (element in this) {
-      if (f.call(element)) {
-        result = result + 1
-      }
+      if (f.call(element)) result = result + 1
     }
     return result
   }
@@ -42,20 +56,6 @@ class Sequence {
     return result
   }
 
-  all(f) {
-    for (element in this) {
-      if (!f.call(element)) return false
-    }
-    return true
-  }
-
-  any(f) {
-    for (element in this) {
-      if (f.call(element)) return true
-    }
-    return false
-  }
-
   reduce(acc, f) {
     for (element in this) {
       acc = f.call(acc, element)
diff --git a/doc/site/core/sequence.markdown b/doc/site/core/sequence.markdown
index 807e6c84..a7d10022 100644
--- a/doc/site/core/sequence.markdown
+++ b/doc/site/core/sequence.markdown
@@ -13,8 +13,8 @@ core [iterator protocol][] can extend this to get a number of helpful methods.
 Tests whether all the elements in the sequence pass the `predicate`.
 
 Iterates over the sequence, passing each element to the function `predicate`.
-If its return value evaluates to `false`, stops iterating and returns `false`.
-Otherwise, returns `true`.
+If it returns something [false](../control-flow.html#truth), stops iterating
+and returns the value. Otherwise, returns `true`.
 
     :::dart
     [1, 2, 3].all {|n| n > 2} // False.
@@ -25,8 +25,8 @@ Otherwise, returns `true`.
 Tests whether any element in the sequence passes the `predicate`.
 
 Iterates over the sequence, passing each element to the function `predicate`.
-If its return value evaluates to `true`, stops iterating and returns `true`.
-Otherwise, returns `false`.
+If it returns something [true](../control-flow.html#truth), stops iterating and
+returns that value. Otherwise, returns `false`.
 
     :::dart
     [1, 2, 3].any {|n| n < 1} // False.
diff --git a/src/vm/wren_core.c b/src/vm/wren_core.c
index ea75e896..a0f96caa 100644
--- a/src/vm/wren_core.c
+++ b/src/vm/wren_core.c
@@ -45,11 +45,27 @@
 // This string literal is generated automatically from core. Do not edit.
 static const char* libSource =
 "class Sequence {\n"
+"  all(f) {\n"
+"    var result = true\n"
+"    for (element in this) {\n"
+"      result = f.call(element)\n"
+"      if (!result) return result\n"
+"    }\n"
+"    return result\n"
+"  }\n"
+"\n"
+"  any(f) {\n"
+"    var result = false\n"
+"    for (element in this) {\n"
+"      result = f.call(element)\n"
+"      if (result) return result\n"
+"    }\n"
+"    return result\n"
+"  }\n"
+"\n"
 "  contains(element) {\n"
 "    for (item in this) {\n"
-"      if (element == item) {\n"
-"        return true\n"
-"      }\n"
+"      if (element == item) return true\n"
 "    }\n"
 "    return false\n"
 "  }\n"
@@ -65,9 +81,7 @@ static const char* libSource =
 "  count(f) {\n"
 "    var result = 0\n"
 "    for (element in this) {\n"
-"      if (f.call(element)) {\n"
-"        result = result + 1\n"
-"      }\n"
+"      if (f.call(element)) result = result + 1\n"
 "    }\n"
 "    return result\n"
 "  }\n"
@@ -88,20 +102,6 @@ static const char* libSource =
 "    return result\n"
 "  }\n"
 "\n"
-"  all(f) {\n"
-"    for (element in this) {\n"
-"      if (!f.call(element)) return false\n"
-"    }\n"
-"    return true\n"
-"  }\n"
-"\n"
-"  any(f) {\n"
-"    for (element in this) {\n"
-"      if (f.call(element)) return true\n"
-"    }\n"
-"    return false\n"
-"  }\n"
-"\n"
 "  reduce(acc, f) {\n"
 "    for (element in this) {\n"
 "      acc = f.call(acc, element)\n"
diff --git a/test/core/list/all.wren b/test/core/list/all.wren
deleted file mode 100644
index c3ec24e5..00000000
--- a/test/core/list/all.wren
+++ /dev/null
@@ -1,9 +0,0 @@
-var a = [1, 2, 3]
-var b = a.all {|x| x > 1 }
-IO.print(b) // expect: false
-
-var d = a.all {|x| x > 0 }
-IO.print(d) // expect: true
-
-var e = [].all {|x| false }
-IO.print(e) // expect: true
diff --git a/test/core/list/all_non_bool_returning_fn.wren b/test/core/list/all_non_bool_returning_fn.wren
deleted file mode 100644
index ca7e46ed..00000000
--- a/test/core/list/all_non_bool_returning_fn.wren
+++ /dev/null
@@ -1 +0,0 @@
-IO.print([1, 2, 3].all {|x| "truthy" }) // expect: true
diff --git a/test/core/list/any.wren b/test/core/list/any.wren
deleted file mode 100644
index 79c1cfca..00000000
--- a/test/core/list/any.wren
+++ /dev/null
@@ -1,10 +0,0 @@
-var a = [1, 2, 3]
-
-var b = a.any {|x| x > 3 }
-IO.print(b) // expect: false
-
-var d = a.any {|x| x > 1 }
-IO.print(d) // expect: true
-
-var e = [].any {|x| true }
-IO.print(e) // expect: false
diff --git a/test/core/list/any_non_bool_returning_fn.wren b/test/core/list/any_non_bool_returning_fn.wren
deleted file mode 100644
index cdd2b575..00000000
--- a/test/core/list/any_non_bool_returning_fn.wren
+++ /dev/null
@@ -1 +0,0 @@
-IO.print([1, 2, 3].any {|x| "truthy" }) // expect: true
diff --git a/test/core/sequence/all.wren b/test/core/sequence/all.wren
new file mode 100644
index 00000000..5b26f05a
--- /dev/null
+++ b/test/core/sequence/all.wren
@@ -0,0 +1,10 @@
+var a = [1, 2, 3]
+IO.print(a.all {|x| x > 1 }) // expect: false
+IO.print(a.all {|x| x > 0 }) // expect: true
+IO.print([].all {|x| false }) // expect: true
+
+// Returns first falsey value.
+IO.print(a.all {|x| x < 2 ? null : false }) // expect: null
+
+// Returns last truthy value.
+IO.print(a.all {|x| x }) // expect: 3
\ No newline at end of file
diff --git a/test/core/list/all_non_function_arg.wren b/test/core/sequence/all_non_function_arg.wren
similarity index 100%
rename from test/core/list/all_non_function_arg.wren
rename to test/core/sequence/all_non_function_arg.wren
diff --git a/test/core/sequence/any.wren b/test/core/sequence/any.wren
new file mode 100644
index 00000000..c60d70c8
--- /dev/null
+++ b/test/core/sequence/any.wren
@@ -0,0 +1,10 @@
+var a = [1, 2, 3]
+IO.print(a.any {|x| x > 3 }) // expect: false
+IO.print(a.any {|x| x > 1 }) // expect: true
+IO.print([].any {|x| true }) // expect: false
+
+// Returns first truthy value.
+IO.print(a.any {|x| x }) // expect: 1
+
+// Returns last falsey value.
+IO.print(a.any {|x| x < 2 ? null : false }) // expect: false
diff --git a/test/core/list/any_non_function_arg.wren b/test/core/sequence/any_non_function_arg.wren
similarity index 100%
rename from test/core/list/any_non_function_arg.wren
rename to test/core/sequence/any_non_function_arg.wren