I staggered vaguely to my feet, on an arbitrary assumption as to which way was up.

In some cases, the need for nearly arbitrary assumptions is obvious.

However, these types of disorders are very complicated, so arbitrary assumptions should be avoided.

After all, such value-judgements are surely based on highly subjective and arbitrary Judeo-Christian assumptions and prejustices.

We suffered no losses, but during the operation the machine-gun platoon commander complained to the regimental commander regarding my arbitrary assumption of command.

He releases one from the arbitrary but all too easy assumption that there is even an ideal "perfection" in organic life.

Kant's schemata of pure concepts are entirely undemonstrable and are a merely arbitrary assumption.

"You're making an arbitrary assumption," I said.

The bureau's understanding of what constitutes a plausible household makes some arbitrary assumptions.

This procedure provides plenty of room for fudging the figures and building in arbitrary assumptions.