diff --git a/petri/src/lib.rs b/petri/src/lib.rs
index 686c795..63f5501 100644
--- a/petri/src/lib.rs
+++ b/petri/src/lib.rs
@@ -18,10 +18,8 @@ pub struct Chunk {
 	pub contents: Box<[[Cell; CHUNK_SIZE]; CHUNK_SIZE]>,
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Default, Serialize, Deserialize)]
 pub struct Rule {
-	#[serde(default)]
-	pub name: String,
 	base: SubRule,
 	#[serde(skip)]
 	variants: Vec<SubRule>,
@@ -63,6 +61,12 @@ pub enum RuleCellTo {
 	Copy(usize),
 }
 
+impl std::default::Default for SubRule {
+	fn default() -> Self {
+		Self::new()
+	}
+}
+
 impl SubRule {
 	fn new() -> Self {
 		Self {
@@ -115,18 +119,6 @@ impl Rule {
 	pub const SHRINK_UP: ResizeParam = (0, -1, 0, 1);
 	pub const SHRINK_DOWN: ResizeParam = (0, -1, 0, 0);
 
-	pub fn new() -> Self {
-		Self {
-			name: "new rule".into(),
-			enabled: false,
-			base: SubRule::new(),
-			variants: vec![SubRule::new()],
-			flip_h: false,
-			flip_v: false,
-			rotate: false,
-		}
-	}
-
 	pub fn get(&self, x: usize, y: usize) -> (RuleCellFrom, RuleCellTo) {
 		self.base.get(x, y)
 	}
@@ -288,7 +280,7 @@ impl Dish {
 						(RuleCellFrom::One(Cell(0)), RuleCellTo::One(Cell(1))),
 					],
 				},
-				..Rule::new()
+				..Rule::default()
 			},
 			Rule {
 				enabled: true,
@@ -303,7 +295,7 @@ impl Dish {
 					],
 				},
 				flip_h: true,
-				..Rule::new()
+				..Rule::default()
 			},
 		];
 
diff --git a/uscope/src/main.rs b/uscope/src/main.rs
index 1b47900..f36c2b6 100644
--- a/uscope/src/main.rs
+++ b/uscope/src/main.rs
@@ -174,30 +174,19 @@ impl eframe::App for UScope {
 					ui.heading("Rules");
 
 					let mut to_remove = None;
-					let mut to_clone = None;
 					for (i, rule) in self.dish.rules.iter_mut().enumerate() {
 						ui.separator();
 						rule_editor(ui, rule, &self.cell_types, &self.dish.cell_groups);
-						ui.horizontal(|ui| {
-							if ui.button("delete").clicked() {
-								to_remove = Some(i);
-							}
-							if ui.button("copy").clicked() {
-								to_clone = Some(i);
-							}
-						});
+						if ui.button("delete").clicked() {
+							to_remove = Some(i);
+						}
 					}
 					if let Some(i) = to_remove {
 						self.dish.rules.remove(i);
 					}
-					if let Some(i) = to_clone {
-						let mut new_rule = self.dish.rules[i].clone();
-						new_rule.enabled = false;
-						self.dish.rules.push(new_rule);
-					}
 					ui.separator();
 					if ui.button("add rule").clicked() {
-						self.dish.rules.push(Rule::new());
+						self.dish.rules.push(Rule::default());
 					}
 				});
 			});