Children do not make the same rigid distinction between humans and animals that adults learn to make.

Replies: There is not a rigid distinction between vapors and gases.

It is probably artificial to draw too rigid a distinction between the popular and art-music examples.

The theatre reflected the rigid social distinctions of the day.

Yet Mr. Jones's choreography set up no rigid distinctions between specifically male and female types of movement.

That these were not fixed or rigid distinctions, however, is shown by the customs of Villefranche-de-Lauragais in 1280.

This encouraged the courts to draw a rigid distinction between judicial and administrative decisions.

Dualism maintains a rigid distinction between the realms of mind and matter.

But at the level of field studies there was a much less rigid distinction between professional and amateur.

However, it is unlikely that such a rigid distinction may be made.