ETYM Latin conjecturalis: cf. French conjectural.
Based primarily on surmise rather than adequate evidence; SYN. supposed, suppositional, suppositious, supposititious.
ETYM Latin probabilis, from probare to try, approve, prove: cf. French probable. Related to Prove, Provable.
1. Apparently destined.
2. Likely but not certain to be or become true or real; SYN. likely, plausible.
Speculatively, suppositionally, theoretically