diff --git a/examples/shirt.modal b/examples/shirt.modal
new file mode 100644
index 0000000..478b784
--- /dev/null
+++ b/examples/shirt.modal
@@ -0,0 +1,9 @@
+
+<> (what is ?x) (is ?x a (programming language))
+<> (is ?x a ?y) (or, is ?x (a virtual machine))
+<> (or, is ?x ?y) (?x is ?y <> ?y (a meta-language))
+<> ((a meta-language)) modal
+<> (?x is ?x) (?(?: ?:) ?x)
+
+what is modal
+