I seriously urge your organization to base your reports on hard facts instead of speculation.

speculation 是名词，来自动词 speculate（推测、猜测），speculate 由词根 specul（观察）和动词后缀 -ate 组成，字面意思是"通过观察来推断"。speculation 指"没有充分证据的猜测或推测"。