diff --git a/TODO.md b/TODO.md
index 59425af..eb604a9 100644
--- a/TODO.md
+++ b/TODO.md
@@ -4,4 +4,6 @@
 - writing a value does two things
   1. establishes a fungible "init" phase (where we can take advantage of accumulator sharing)
   2. allows read-leases for some known scope
+- shared initialization can happen with constants but can also be shared with read side effects
+  - is the spec for reading from a register descriable as data? e.g. are these two requests semantically equal vs independent side-effects
 - but what then is a write lease and how is it finite?