fecund
Fruitful and inventive; producing many ideas or imaginative works, especially of a mind.
Synonyms: fruitful, creative, inventive, prolific
Her fecund mind supplied enough ideas for a dozen essays before breakfast.
facile
1. Easily accomplished; requiring little effort.
Synonyms: easy, effortless, readily accomplished
For an experienced editor, correcting the obvious typo was a facile task.
2. Achieved without due care or thought; superficially convincing but lacking depth.
Synonyms: superficial, glib, shallow, oversimplified
His facile explanation blamed every economic problem on taxes and ignored the evidence.