I have noticed that there are a quite number of message strings that end with
a "Thank you, that works perfectly" or something similar. The "Was this post
helpful to you?" at the bottom is rarely checked in these instances.

There are reasons for checking "Yes" when it applies. First, the person
offering the solution receives credit for a helpful response and Second, the
search for "Threads with helpful posts." would be so much more efficient.

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Best wishes,

Jim