Speculative:

adjective

1.

engaged in, expressing, or based on conjecture rather than knowledge.

2. theoretical, rather than practical.

speculative - not based on fact or investigation

notional

theoretic, theoretical - concerned primarily with theories or hypotheses rather than practical considerations; "theoretical science"

hypothetical, academic, theoretical, abstract, tentative, notional, conjectural, suppositional

risky, uncertain, hazardous, unpredictable

Materiality:

noun

1.

the quality of being composed of matter.

2.the state or quality of being physical or material.

		materiality - the quality of being physical; consisting of matter corporality, corporeality, physicalness  Corporeality: 1. Of, relating to, or characteristic of the body. 2. Of a material nature; tangible.