diff --git a/Assets/Cryville/Crtr/PdtEvaluator.cs b/Assets/Cryville/Crtr/PdtEvaluator.cs
index f7a18fe..00ec94b 100644
--- a/Assets/Cryville/Crtr/PdtEvaluator.cs
+++ b/Assets/Cryville/Crtr/PdtEvaluator.cs
@@ -107,8 +107,8 @@ namespace Cryville.Crtr {
 		static readonly int _colop_and = IdentifierManager.Shared.Request("&");
 		static readonly int _colop_or = IdentifierManager.Shared.Request("|");
 		protected override bool Collapse(int name, PdtVariableMemory param) {
-			if (name == _colop_and) return param.Type == PdtInternalType.Number && param.AsNumber() <= 0;
-			else if (name == _colop_or) return param.Type != PdtInternalType.Number || param.AsNumber() > 0;
+			if (name == _colop_and) return (param.Type == PdtInternalType.Number || param.Type == PdtInternalType.Vector) && param.AsNumber() <= 0;
+			else if (name == _colop_or) return (param.Type != PdtInternalType.Number && param.Type != PdtInternalType.Vector) || param.AsNumber() > 0;
 			else throw new KeyNotFoundException(string.Format("Undefined collapse operator {0}", IdentifierManager.Shared.Retrieve(name)));
 		}