“Tenses are controlled. For example, you cannot use the present perfect tense. Typically, you would write the sentence using the simple past tense.”

And then in the About the Author section we have this biographical information:

“Mike Unwalla helps people to use complex software. He has been writing user documentation for software companies since 1995.”

Given the writing rule and the ambiguity of the word “since”, shouldn’t the last sentence be this:

“He wrote user documentation for software from 1995 until now.”

My vote, for the record, is to ignore the rule and keep the bio as is.