Exhibit a in will be the video the father posted on
YouTube of the child wearing a mask dancing around behind him.
Beyond a reasonable doubt is the criminal law standard. Clear and convincing is the standard applied to most constitutional law questions while preponderance of the evidence is applied to most civil law matters.*
and now you are talking about the ADA where there is a clearly established public health exception. Current accepted science says masks are a necessary precaution to help prevent the spread. That is different than the WA case you cited before to support your claims that disney was in violation of FL state law.
* this is a very simplistic version of burdens of proof. There are exceptions where a different standard may be applied but it’s like three semester long classes in law school that talks about the nuisances so...