He just was not interested in this abstract speculation.

It is not a religion or philosophy which can be confined to the realm of abstract speculation or theoretical debate.

Not in a mood for abstract speculation?

Indonesian philosophy is a generic designation for the tradition of abstract speculation held by the people who inhabit the region now known as Indonesia.

It speaks to the real needs of the age to at last have a design theory derived from abstract speculation.

It then passes to the metaphysical form where the knowledge is explained by abstract philosophical speculation.

He showed more zeal and interest in the ascetic ideal than in abstract speculation.

"But, Hilda my love, that was merely abstract speculation!"

Vague references in old books made for interesting abstract speculation, but seeing it with his own eyes was quite something else.

I repeat that I do not mean to follow the abstract speculation.