Unseatable

The one time I got called for Jury Duty, it was great: / -I worked for a Newspaper. / -I had long hair with a dyed blonde streak. / -My Mom was in litigation over a hit & run. / I was completely unseatable.

Source: wiktionary

If there are five people in a room and four chairs, then you cannot seat all the people simultaneously, despite the fact that, for each person you might choose among the five, there are ways of seating that person (and three others). There is no magically unseatable person.

Source: wiktionary

The seat described has successfully seated a child that was previously unseatable in a static chair. He is comfortable and is able to sit in his chair for extended periods of time.

Source: wiktionary

Consider the analogy of the game of musical chairs. Since there are fewer seat^([sic]) than players, this means that there are bound to be some that go without. And yet that does not means that they are somehow inherently unseatable. No player is in principle unseatable—destined to go without.

Source: wiktionary