The more you think about and interact with other people, the more you realize that it is untenable to privilege your interests over theirs.
Non-pantheist models for god seem almost completely untenable to me, though not without interest.
People leave when life becomes untenable where they are.
Health care is the No. 1 concern of small businesses and the status quo is untenable.
For any thinking person, it (perpetual happiness) is untenable. If you're a thinking person, your upbeat sometimes, said sometimes.
With the destruction of history, contemporary events themselves retreat into a remote and fabulous realm of unverifiable stories, uncheckable statistics, unlikely explanations and untenable reasoning.
I would construct and work along various lines until I found them untenable. When one theory was discarded, I developed another at once. I realized very early that this was the only possible way for me to work out all the problems.