Lay testimony refers to an experts opinion about a specific topic?

No, Lay testimony is the evidence brought in light by the witness who is not an expert but can testify to interferences and opinions.

Lay opinion testimony is admissible as long as it helps as a factfinder and rationally depends on the personal perceptions. Lay witness’ opinions are often more helpful than the other raw data which form the base of the belief.

Lay opinion testimony refers to evidence given by a witness who is not qualified as an expert but who testifies to opinions or inferences. For example, a testimony showing a person was “angry” or “ excited” is more convincing and understandable compared to a lengthy, physical description of the man’s outward expression.

The law as stated in the book(decree/act) is known the following:

USCS Fed Rules Evid R 701. Opinion Testimony by Lay Witnesses.

Additionally, it is limited to opinions which are rational, helpful and not based on specific knowledge under Rule 702.

i think one answer could be this poet uses no rhyme.

are you asking for an essay and whats the story?