Hence / on this basis (由此 / 据此)

Structure … (premise / fact)，由此 / 由此可见 / 据此 + consequence or conclusion

Three anaphoric essay-and-press connectors that build on what was just said (the 此). 由此 (yóucǐ) = "from this / hence": it introduces what follows or arises from the premise (由此引发了讨论 "this gave rise to a debate"). 由此可见 (yóucǐ kějiàn) closes it as a reasoned conclusion, "from this it can be seen that…": it is the fuller, formal version of HSK 5's 可见, with explicit 由此 marking what the inference rests on. 据此 (jùcǐ) = "on this basis / accordingly", the most legal-administrative of the three: a decision or ruling grounded in the foregoing (据此作出判决 "a verdict was handed down on this basis"). All three open the second clause.

Examples

数shù据jù连lián年nián增zēng长zhǎng，由yóu此cǐ引yǐn发fā了le广guǎng泛fàn讨tǎo论lùn。
The figures rose year after year, hence sparking wide-ranging debate.
由yóu此cǐ可kě见jiàn，教jiào育yù对duì一yī个gè国guó家jiā至zhì关guān重zhòng要yào。
From this it is clear that education is vital to a country.
法fǎ院yuàn据jù此cǐ作zuò出chū了le最zuì终zhōng判pàn决jué。
On this basis the court handed down its final ruling.
证zhèng据jù确què凿záo，由yóu此cǐ可kě以yǐ认rèn定dìng其qí有yǒu罪zuì。
The evidence is conclusive, hence he can be found guilty.

Levels are indicative: they follow the standard Chinese Grammar Wiki (AllSet Learning) progression, not an official HSK 3.0 mapping. We never assign levels by eye.

This point and the other 370, with audio on every example, inside Wanyu.