The record
Rep. Khanna characterized the memo as showing J&J was "intentionally trying to sell more of this product to African Americans and the Hispanic American community" and asked whether the company "acted in deliberate disregard of the risks." He separately stated the inference of knowledge was assumed: "one can only assume they knew because 10 years earlier there was a study linking this product to cancer."
Claim scope
That the knowledge-plus-targeting inference was framed in the hearing as an assumption by the questioning member, in his own words ('one can only assume').
What this source does not establish
Nothing about what J&J knew or why it targeted these populations. A member's question is not evidence; a member's stated assumption is expressly not evidence.
Limitations
This quote is the best available demonstration that even the most aggressive framing in the congressional record labels itself an assumption. It is useful to the page as an honesty anchor, not as support for the inference.
Source
Gov Report — CHRG-116hhrg36060, pp. 14-15