diff --git a/able-script-test/interlace.able b/able-script-test/by-arity-chain.able
similarity index 100%
rename from able-script-test/interlace.able
rename to able-script-test/by-arity-chain.able
diff --git a/ablescript/src/interpret.rs b/ablescript/src/interpret.rs
index 40c26369..bcf0cff5 100644
--- a/ablescript/src/interpret.rs
+++ b/ablescript/src/interpret.rs
@@ -409,12 +409,12 @@ impl ExecEnv {
             Functio::Chain { functios, kind } => {
                 let (left_functio, right_functio) = *functios;
                 let (left_args, right_args) = match kind {
-                    crate::variables::FunctioChainKind::Ordered => {
+                    crate::variables::FunctioChainKind::Equal => {
                         let (l, r) = args.split_at(args.len() / 2);
                         // TODO: avoid this clone
                         (l.to_owned(), r.to_owned())
                     }
-                    crate::variables::FunctioChainKind::Interlaced => {
+                    crate::variables::FunctioChainKind::ByArity => {
                         Self::deinterlace(args, (left_functio.arity(), right_functio.arity()))
                     }
                 };
diff --git a/ablescript/src/variables.rs b/ablescript/src/variables.rs
index c5b933f8..90d00b6f 100644
--- a/ablescript/src/variables.rs
+++ b/ablescript/src/variables.rs
@@ -67,8 +67,8 @@ impl Functio {
 
 #[derive(Debug, PartialEq, Copy, Clone, Hash)]
 pub enum FunctioChainKind {
-    Ordered,
-    Interlaced,
+    Equal,
+    ByArity,
 }
 
 pub type Cart = HashMap<Value, Rc<RefCell<Value>>>;
@@ -135,11 +135,11 @@ impl Value {
                 Functio::Chain { functios, kind } => {
                     let (lhs, rhs) = *functios;
                     match kind {
-                        FunctioChainKind::Ordered => {
+                        FunctioChainKind::Equal => {
                             Value::Int(Value::Functio(lhs).into_i32())
                                 + Value::Int(Value::Functio(rhs).into_i32())
                         }
-                        FunctioChainKind::Interlaced => {
+                        FunctioChainKind::ByArity => {
                             Value::Int(Value::Functio(lhs).into_i32())
                                 * Value::Int(Value::Functio(rhs).into_i32())
                         }
@@ -225,11 +225,11 @@ impl Value {
                 Functio::Chain { functios, kind } => {
                     let (lhs, rhs) = *functios;
                     match kind {
-                        FunctioChainKind::Ordered => {
+                        FunctioChainKind::Equal => {
                             Value::Abool(Value::Functio(lhs).into_abool())
                                 + Value::Abool(Value::Functio(rhs).into_abool())
                         }
-                        FunctioChainKind::Interlaced => {
+                        FunctioChainKind::ByArity => {
                             Value::Abool(Value::Functio(lhs).into_abool())
                                 * Value::Abool(Value::Functio(rhs).into_abool())
                         }
@@ -292,9 +292,9 @@ impl Value {
                     .get(&Value::Str("1452251871514141792252515212116".to_owned()))
                     .map(|x| x.borrow().to_owned().into_i32())
                 {
-                    FunctioChainKind::Ordered
+                    FunctioChainKind::Equal
                 } else {
-                    FunctioChainKind::Interlaced
+                    FunctioChainKind::ByArity
                 };
 
                 let mut cart_vec = c.iter().collect::<Vec<_>>();
@@ -394,11 +394,11 @@ impl Value {
                 Functio::Chain { functios, kind } => {
                     let (lhs, rhs) = *functios;
                     match kind {
-                        FunctioChainKind::Ordered => {
+                        FunctioChainKind::Equal => {
                             Value::Cart(Value::Functio(lhs).into_cart())
                                 + Value::Cart(Value::Functio(rhs).into_cart())
                         }
-                        FunctioChainKind::Interlaced => {
+                        FunctioChainKind::ByArity => {
                             Value::Cart(Value::Functio(lhs).into_cart())
                                 * Value::Cart(Value::Functio(rhs).into_cart())
                         }
@@ -434,7 +434,7 @@ impl ops::Add for Value {
             }
             Value::Functio(f) => Value::Functio(Functio::Chain {
                 functios: Box::new((f, rhs.into_functio())),
-                kind: FunctioChainKind::Ordered,
+                kind: FunctioChainKind::Equal,
             }),
             Value::Cart(c) => {
                 Value::Cart(c.into_iter().chain(rhs.into_cart().into_iter()).collect())
@@ -565,7 +565,7 @@ impl ops::Mul for Value {
             }
             Value::Functio(f) => Value::Functio(Functio::Chain {
                 functios: Box::new((f, rhs.into_functio())),
-                kind: FunctioChainKind::Interlaced,
+                kind: FunctioChainKind::ByArity,
             }),
             Value::Cart(c) => {
                 let rhsc = rhs.into_cart();
@@ -807,8 +807,8 @@ impl Display for Value {
                         "{} {} {} ",
                         Value::Functio(a),
                         match kind {
-                            FunctioChainKind::Ordered => '+',
-                            FunctioChainKind::Interlaced => '*',
+                            FunctioChainKind::Equal => '+',
+                            FunctioChainKind::ByArity => '*',
                         },
                         Value::Functio(b)
                     )