The function is undifferentiable at that point, so we cannot apply the usual derivative rules.

The undifferentiating approach to student assessment ignored individual learning differences.

The committee's decisions felt undifferentiated, making it hard to see any distinct priorities.

The artist deliberately embraced undifferentiation in the abstract series to blur the boundaries between form and color.

The committee's report cited several undifferentiations in the policy proposals, which made it difficult to evaluate their effectiveness.

The undifferentiability of the fractal curve made it impossible to apply standard calculus techniques.

The new policy applies undifferentially to all departments, regardless of their size or budget.

The undifferential handling of patient samples led to inconclusive diagnostic results.