sort by best latest
If it does what it is supposed to do then you know it is working. If it supplies the need then it is working.
If it maintains its purpose, then it is working.
If it remains turned on when you turn it on, then you know it is definitely working.
You can help the HubPages community highlight top quality content by ranking this answer up or down.
Copyright © 2017 HubPages Inc. and respective owners. Other product and company names shown may be trademarks of their respective owners. HubPages® is a registered Service Mark of HubPages, Inc. HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.
Copyright © 2017 HubPages Inc. and respective owners.