diff --git a/chapters/authorization-authentication.adoc b/chapters/authorization-authentication.adoc
index 0784ba7b..dda908c1 100644
--- a/chapters/authorization-authentication.adoc
+++ b/chapters/authorization-authentication.adoc
@@ -706,10 +706,10 @@ spent.
 (nonpayment data)")))((("nonpayment data")))((("blockchain (the)",
 "nonpayment data recording")))((("digital notary services")))Bitcoin's
 distributed and timestamped ledger, the blockchain, has potential uses
-far beyond payments. Many developers have tried to use the transaction
+beyond payments. Many developers have tried to use the transaction
 scripting language to take advantage of the security and resilience of
-the system for applications such as digital notary services, stock
-certificates, and smart contracts. Early attempts to use bitcoin's
+the system for applications such as digital notary services
+and smart contracts. Early attempts to use bitcoin's
 script language for these purposes involved creating transaction outputs
 that recorded data on the blockchain; for example, to record a digital
 fingerprint of a file in such a way that anyone could establish