diff --git a/proposals/README.md b/proposals/README.md
index edd666234144..6a37c3a21fff 100644
--- a/proposals/README.md
+++ b/proposals/README.md
@@ -50,6 +50,7 @@ request:
 -   [0149 - Change documentation style guide](p0149.md)
     -   [Decision](p0149_decision.md)
 -   [0162 - Basic Syntax](p0162.md)
+    -   [Decision](p0162_decision.md)
 -   [0175 - C++ interoperability goals](p0175.md)
 
 <!-- endproposals -->
diff --git a/proposals/p0162_decision.md b/proposals/p0162_decision.md
new file mode 100644
index 000000000000..fc2f876ce41e
--- /dev/null
+++ b/proposals/p0162_decision.md
@@ -0,0 +1,45 @@
+# Decision for: Basic Syntax #162
+
+<!--
+Part of the Carbon Language project, under the Apache License v2.0 with LLVM
+Exceptions. See /LICENSE for license information.
+SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+-->
+
+Proposal accepted on 2020-11-10
+
+Affirming:
+
+-   [austern](https://github.com/austern)
+-   [chandlerc](https://github.com/chandlerc)
+-   [geoffromer](https://github.com/geoffromer)
+-   [gribozavr](https://github.com/gribozavr)
+-   [josh11b](https://github.com/josh11b)
+-   [noncombatant](https://github.com/noncombatant)
+-   [zygoloid](https://github.com/zygoloid)
+
+Abstaining:
+
+-   [tituswinters](https://github.com/tituswinters)
+
+## Rationale
+
+Using code to validate our specification is a really promising direction, and
+this proposal seems like a good starting point. A reference implementation
+that's simple enough to be part of the design iteration process should help us
+move faster, by quickly uncovering the places where our specifications are
+ambiguous, syntactically or semantically unsound, or don't give the behavior we
+expect. In other words, it will help us keep ourselves honest, even at the
+proposal stage, which will help us avoid wasting time and effort implementing
+designs that turn out to be unworkable.
+
+This can be considered as sort of a counterpart to
+[In-progress design overview #83](p0083.md), in that the design specifics are
+being approved in order to bootstrap the specification process. We aren't
+necessarily adopting the specific syntax and semantics expressed by this
+proposal, and those choices will need to be presented and justified from scratch
+by future proposals.
+
+This decision is deferring the implementation to code review. The specific
+tooling used to implement the syntax checker, such as Bison, is a detail which
+may be changed, now or later, without requiring a proposal for core team review.