diff --git a/src/card_game.rs b/src/card_game.rs
index 70b2a15..47de146 100644
--- a/src/card_game.rs
+++ b/src/card_game.rs
@@ -4,7 +4,7 @@ use crate::Rng;
 pub trait Game {
 	type Instruction;
 	fn possible_instructions(&self) -> impl Iterator<Item = Self::Instruction> + use<Self>;
-	fn validate_instruction(&self, instruction: Self::Instruction) -> bool;
+	fn is_instruction_valid(&self, instruction: Self::Instruction) -> bool;
 	fn process_instruction(&mut self, instruction: Self::Instruction);
 	fn is_win(&self) -> bool;
 }
@@ -192,8 +192,8 @@ where
 	fn possible_instructions(&self) -> impl Iterator<Item = Self::Instruction> + use<G> {
 		self.state.possible_instructions()
 	}
-	fn validate_instruction(&self, instruction: Self::Instruction) -> bool {
-		self.state.validate_instruction(instruction)
+	fn is_instruction_valid(&self, instruction: Self::Instruction) -> bool {
+		self.state.is_instruction_valid(instruction)
 	}
 	fn process_instruction(&mut self, instruction: Self::Instruction) {
 		self.history.push(instruction.clone());
diff --git a/src/klondike.rs b/src/klondike.rs
index 6d98328..a352404 100644
--- a/src/klondike.rs
+++ b/src/klondike.rs
@@ -75,7 +75,7 @@ impl KlondikeState {
 	fn pile_mut(&mut self, index: KlondikePileId) -> &mut Pile {
 		&mut self.piles[index as usize]
 	}
-	fn validate_instruction(&self, instruction: KlondikeInstruction) -> bool {
+	fn is_instruction_valid(&self, instruction: KlondikeInstruction) -> bool {
 		match instruction {
 			// Stock -> Stock draws a card or resets the stock
 			KlondikeInstruction {
@@ -208,10 +208,10 @@ impl Game for Klondike {
 	type Instruction = KlondikeInstruction;
 	fn possible_instructions(&self) -> impl Iterator<Item = Self::Instruction> + use<> {
 		let state = self.state.clone();
-		KlondikeIter::new().filter(move |&instruction| state.validate_instruction(instruction))
+		KlondikeIter::new().filter(move |&instruction| state.is_instruction_valid(instruction))
 	}
-	fn validate_instruction(&self, instruction: Self::Instruction) -> bool {
-		self.state.validate_instruction(instruction)
+	fn is_instruction_valid(&self, instruction: Self::Instruction) -> bool {
+		self.state.is_instruction_valid(instruction)
 	}
 	fn process_instruction(&mut self, instruction: Self::Instruction) {
 		let card = self.pile_mut(instruction.src).pop().unwrap();