So, since there’s no {bIchultaH} in the sentence, we’re not really saying much in terms of the duration of Kahless being wise. At some point while he was living, he was wise, at least once. Maybe several times. Maybe a lot of times, but certainly not continuously.

That's not how -taH works. You don't need -taH on a quality verb that has its quality for more than a moment. bIchul doesn't mean you were wise in one instance. It means you have the quality of wisdom and doesn't say anything about how long you had that quality. To say bIchultaH, on the other hand, is to say that you have the quality of wisdom for an ongoing period. bIyIntaHvIS bIchul could mean you are wise some or all of the time you are alive. You might be wise occasionally or constantly. bIyIntaHvIS bIchultaH would almost always be interpreted as saying that you are wise throughout your life.

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SuStel
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