Look at this sample web page.

It was created in 1998, so it would seem that the information is up to date…

 

…but in fact this information was written in ancient Greece by Hippocrates nearly 2500 years ago!

You will need to check something much more recent to see if the information is still OK.

 

Old information is not necessarily out of date, but there may be newer information available that makes a difference.

 

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