Fix grammar suggested by @TallTed in #1549.

index.html

@@ -269,10 +269,10 @@
       <p>
 [=Credentials=] are integral to our daily lives; driver's licenses confirm
 our capability to operate motor vehicles, university degrees assert our level
-of education, and government-issued passports permit travel between countries.
-This specification provides a mechanism to express these sorts of
-[=credentials=] on the Web in cryptographically secure, privacy-respecting,
-and machine-verifiable way.
+of education, and government-issued passports attest to our citizenship when
+traveling countries. This specification provides a mechanism to express these
+sorts of [=credentials=] on the Web in a cryptographically secure,
+privacy-respecting, and machine-verifiable way.
       </p>
     </section>
 
@@ -303,27 +303,27 @@
       <h2>Introduction</h2>
 
       <p>
-[=Credentials=] are integral to our daily lives; driver's licenses confirm
+[=Credentials=] are integral to our daily lives: driver's licenses confirm
 our capability to operate motor vehicles, university degrees assert our level
-of education, and government-issued passports permit travel between countries.
-This specification provides a mechanism to express these sorts of
-[=credentials=] on the Web in cryptographically secure, privacy-respecting,
-and machine-verifiable way. These [=credentials=] provide
+of education, and government-issued passports attest to our citizenship when 
+traveling between countries. This specification provides a mechanism to express
+these sorts of [=credentials=] on the Web in a cryptographically secure, 
+privacy-respecting, and machine-verifiable way. These [=credentials=] provide
 benefits to us when used in the physical world, but their use on the Web
 continues to be elusive.
       </p>
 
       <p>
-It is currently difficult to express education qualifications, healthcare
-data, financial account details, and other third-party [=verified=]
-machine-readable personal information on the Web. The challenge of expressing
-digital [=credentials=] on the Web hinders our ability to receive the same
-benefits physical [=credentials=] provide us in the real world.
+It is currently difficult to express educational qualifications, healthcare
+data, financial account details, and other third-party-[=verified=]
+personal information in a machine-readable way on the Web. The challenge of
+expressing digital [=credentials=] on the Web hinders our ability to receive
+the same benefits that physical [=credentials=] provide us in the real world.
       </p>
 
       <p>
 This specification standardizes a way of expressing [=credentials=] on the
-Web, ensuring they are cryptographically secure, privacy-respecting, and
+Web that ensures they are cryptographically secure, privacy-respecting, and
 machine-verifiable.
       </p>
 
@@ -340,7 +340,7 @@ <h2>Introduction</h2>
 The components that constitute a [=verifiable presentation=]
         </li>
         <li>
-An ecosystem where one [=verifiable credentials=]
+An ecosystem where [=verifiable credentials=]
 and [=verifiable presentations=] are useful
         </li>
       </ul>
@@ -372,12 +372,12 @@ <h3>What is a Verifiable Credential?</h3>
           <li>
 Information related to specific properties asserted by
 the issuing authority about the [=subject=] (for example, nationality,
-the classes of vehicle entitled to drive, or date of birth)
+date of birth, or the classes of vehicle they're qualified to drive)
           </li>
           <li>
-Evidence demonstrating how the [=subject=] met the qualifications required
-for issuing the [=credential=] (for example, a measurement, proof of
-citizenship, or test result)
+Evidence by which a [=subject=] was demonstrated to have satisfied the
+qualifications required for issuing the [=credential=] (for example,
+a measurement, proof of citizenship, or test result)
           </li>
           <li>
 Information related to constraints on the credential (for example,
@@ -387,8 +387,8 @@ <h3>What is a Verifiable Credential?</h3>
 
         <p>
 A [=verifiable credential=] can represent all the same information that a
-physical [=credential=] represents. The addition of technologies, such as
-digital signatures, makes [=verifiable credentials=] more tamper-evident and
+physical [=credential=] represents. Adding technologies such as
+digital signatures can make [=verifiable credentials=] more tamper-evident and
 trustworthy than their physical counterparts.
         </p>
 
@@ -5969,7 +5969,7 @@ <h3>Unsigned Claims</h3>
 
         <p>
 This specification allows [=credentials=] to be produced that are not secured by
-signatures or proofs of any kind. These class of [=credentials=] are often
+signatures or proofs of any kind. These classes of [=credentials=] are often
 useful for intermediate storage, or self-asserted information, which is
 analogous to filling out a form on a web page. Implementers should be aware that
 these [=credential=] types are not [=verifiable=] because the