speculate

verb4

1. •
   To make an inference based on inconclusive evidence; to surmise or conjecture.

   • We can speculate that in many instances the sharks are not feeding on their victims, but only in a few cases can we guess what they are doing. — 1983
2. •
   To make a risky trade in the hope of making a profit; to venture or gamble.
3. •
   To anticipate which branch of code will be chosen and execute it in advance.
4. •
   To think, meditate or reflect on a subject; to consider, to deliberate or cogitate.

   • It is remarkable that persons who speculate the most boldly often conform with the most perfect quietude to the external regulations of society. — 1850