valid

有充分根据的; 证据确凿的

【律】有效的; 有约束力的; 正当的; 经过正式手续的

[罕]强壮的, 健康的, 精神正常的

valid 指“(理由、论证等)有充分根据的”, 如:

sound 指“在事实上、逻辑上有充分根据因而无可非议的”, 如:

cogent 系正式用语, 指“论据有力, 令人信服的”, 如:

convincing 指“确切得以致不容怀疑和反对的”, 如:

valid

having some foundation; based on truth

legally acceptable

having legal force; effective.having legal authority; binding

having some force or cogency

(of an inference or argument) having premises and conclusion so related that whenever the former are true the latter must also be true, esp (formally valid) when the inference is justified by the form of the premises and conclusion alone. Thus Tom is a bachelor; therefore Tom is unmarried is valid but not formally so, while today is hot and dry; therefore today is hot is formally validSee invalid

healthy or strong