The phrase "are to be valid" is correct and usable in written English.
It is typically used in formal contexts to indicate that something must meet certain criteria or standards to be considered valid.
Example: "All submissions are to be valid according to the guidelines set forth by the committee."
Alternatives: "must be valid" or "should be valid".
If their meanings are to be valid, they must respect this world's grain and texture".
The search for meaning is not something people do in a vacuum, but "in dialogue with a determinate world whose laws they did not invent... If their meanings are to be valid, they must respect this world's grain and texture". Strip down the question as much as you like, but you must give an answer that signifies to others.
The paper briefly summarises the current status of the development of the ideas on the sampling and pre-treatment of potentially contaminated sites, and emphasises the importance which must be attached to the sampling phase of any investigation if the outcomes are to be valid.
If such comparisons are to be valid the photographs must be consistent in color, contrast and intensity for the line/dot indicators.
Thus, adjustment for attrition is necessary if the analyses from the questionnaires variables are to be valid.
Context dependence of questions calls for provision of sufficient background information about the context for which the statements are to be valid.
If a nonlinear plate theory is to be valid, it should work in the extreme case of rigid displacements.
The scope of this manuscript was to define minimum criteria for a CPU that was to be valid nationwide.
The Q hypothesis is necessary if the sort of research that Chalmers and Dickersin cite is to be valid.
Guidance and regulation on research ethics requires that consent to research must be appropriately informed if it is to be valid [ 1, 2, 31].
Thomas Keneally, Australian writer To my post-colonial gaze, to be British is to be many valid, and some invalid, things.
