{"id":"ef96e5f7-606b-4c22-8f52-8e8c474a922d","arxiv_id":"2606.17239","paper_version":1,"verdict":"UNVERDICTED","confidence":"LOW","novelty_score":2.0,"correctness_risk":"unknown","formal_verification":"none","parameter_count":0,"one_line_summary":"Review of active cell sensing strategies that amplify, redistribute, share, and prioritize information beyond passive physical limits.","lead":"This paper reviews how cells use active behaviors to sense beyond passive physical limits by coordinating with others, reshaping their environment, updating themselves, and discriminating signals. A smart generalist might read it to see how biology can overcome information constraints set by physics in cellular sensing.","discovery_kind":"review","skeptic_critique":{"model":"grok-4.3","headline":"No significant objection identified","rationale":"The reader's weakest_assumption correctly isolates the interpretive step that active behaviors exceed passive limits. Because the paper is explicitly a review without new formal results or parameter-free derivations, that step cannot be tested inside the manuscript itself; any load-bearing issue would reside in the individual cited works. The UNVERDICTED verdict therefore remains appropriate.","tokens_in":1573,"tokens_out":290,"duration_ms":16061,"concrete_test":"Pick one cited example under each of the four active-sensing categories and extract the quantitative comparison (e.g., bits of information or SNR improvement) between the active strategy and the corresponding passive physical bound; if at least three of the four examples lack a direct numerical demonstration that the active case exceeds the bound by more than the reported uncertainty, the synthesis claim requires qualification.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The manuscript is a review that synthesizes existing literature on passive sensory limits and four classes of active cellular behaviors (coordination, environmental reshaping, self-updating, signal discrimination). The central claim—that these behaviors often allow cells to surpass or obviate passive limits—is presented as a framing of reported results rather than a new derivation, theorem, or dataset. No internal mathematical inconsistency, hidden assumption in an equation, or unsupported quantitative extrapolation appears in the provided structure; evidentiary weight rests on the cited primary studies.","agreement_with_reader":"agree"},"referee_report":{"model":"grok-4.3","summary":"The manuscript is a review that first outlines classic and recent physical limits on sensory precision in cells, then synthesizes literature on four classes of active cellular behaviors—coordinating with other cells, reshaping the environment, dynamically updating themselves, and discriminating signals—arguing that these allow amplification, redistribution, sharing, and prioritization of sensory information, often surpassing or obviating passive physical limits. It concludes with potential future directions.","tokens_in":1650,"tokens_out":217,"duration_ms":17783,"significance":"If the synthesis of the cited primary studies holds, the review offers a coherent framework integrating physical constraints with active biological mechanisms in cell sensing. It explicitly credits the underlying empirical and theoretical results from the literature for establishing both the passive limits and the active circumventions.","major_comments":[],"minor_comments":[{"comment":"Abstract: the phrase 'recent results' is used without indicating the temporal scope or selection criteria for the reviewed literature.","section":"Abstract"}],"recommendation":"accept","confidential_remarks":null},"author_rebuttal":{"model":"grok-4.3","summary":"We thank the referee for their positive review and recommendation to accept the manuscript. We are pleased that the synthesis of physical limits and active sensing strategies was viewed as coherent and appropriately crediting the underlying literature.","responses":[],"tokens_in":1046,"tokens_out":59,"duration_ms":9617,"standing_objections":[]},"desk_editor":{"model":"grok-4.3","letter":"This paper is a review that synthesizes how cells use active behaviors to overcome physical limits on sensing. It doesn't introduce new findings or derivations.\n\nIt does well in organizing the material. After covering classic limits like the Berg-Purcell bound, it groups active sensing into four classes: coordinating with other cells, reshaping the environment, dynamically updating themselves, and discriminating signals. This structure helps clarify how activity can amplify, redistribute, share, or prioritize information. The citations to recent results provide a good entry point into the literature.\n\nThe soft spots are limited. Since it's a review, the strength depends on the primary papers it cites, and the abstract doesn't detail quantitative comparisons. The assumption that active behaviors genuinely exceed passive limits seems to hold based on the framing, but a reader would verify that in the cited works. No circularity or invented entities here.\n\nThis is for researchers in biophysics interested in cellular information processing who need a structured overview rather than a new model. A serious thinker would find the engagement with the literature honest.\n\nI'd recommend sending it to peer review as a review article, since the organization adds value even without new results.","headline":"Review organizes active cell sensing into four categories with a clean structure but adds no new results or derivations.","tokens_in":2091,"tokens_out":300,"would_cite":false,"duration_ms":24269,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"grok-4.3","headline":"Cells actively amplify, share, and prioritize sensory information to surpass passive physical limits.","keywords":["cell sensing","physical limits","active behaviors","information processing","signal discrimination","cell coordination","environmental reshaping"],"falsifier":"An experiment in which disabling the four listed active mechanisms leaves cells unable to exceed the classic passive precision bounds would falsify the central claim.","tokens_in":2459,"feed_emoji":"🦠","tokens_out":551,"duration_ms":24996,"temperature":0.7,"pith_summary":"Physics determines the information content in signals that cells detect, setting fundamental bounds on precision for passive receivers. Cells, however, are active sensors that reshape both their surroundings and their own states. This review describes four active strategies—coordinating with neighboring cells, modifying the environment, dynamically updating internal states, and discriminating among signals—that let cells amplify, redistribute, share, and prioritize information. These behaviors often exceed or bypass the limits that would apply to passive sensing. The paper therefore frames cell sensing as an active process rather than a purely physical one.","feed_headline":"Active cell behaviors bypass passive sensing limits","feed_subtitle":"Cells coordinate, reshape, update, and discriminate to amplify and share sensory data beyond physics alone.","key_machinery":"Four active sensing implementations—coordinating with other cells, reshaping the environment, dynamically updating themselves, and discriminating signals—that carry the argument by allowing cells to exceed passive limits.","core_discovery":"While physics sets the information contained in sensed signals, cells are active rather than passive sensors. They shape and reshape both the environment and themselves through coordination with other cells, environmental remodeling, internal state updates, and signal discrimination. These active behaviors enable amplification, redistribution, sharing, and prioritization of sensory information, often surpassing or obviating passive physical limits.","pith_inferences":["Sensing models in biology should treat cells as feedback controllers rather than fixed detectors.","Synthetic circuits could be designed to replicate these active strategies for enhanced detection.","The same active principles may apply to other biological information-processing tasks such as chemotaxis or quorum sensing."],"forward_implications":["Cell collectives can process and share information at scales larger than single-cell physics permits.","Dynamic internal updates let cells adapt their sensing to changing external conditions.","Signal discrimination allows prioritization of relevant inputs over noise.","Environmental reshaping can increase the effective information available to the cell."],"fun_headline_variants":["Active cells surpass physical sensing limits","Cells bypass sensing limits with active behaviors","Active sensing lets cells exceed physics limits","Cell coordination amplifies beyond physical bounds","Dynamic updates overcome cell sensing physics"],"cache_read_input_tokens":2112,"weakest_assumption_plain":"Active cell behaviors genuinely exceed the information limits set by passive physics.","fun_headline_variants_meta":{"raw":{"variants":["Active cells surpass physical sensing limits","Cells bypass sensing limits with active behaviors","Active sensing lets cells exceed physics limits","Cell coordination amplifies beyond physical bounds","Dynamic updates overcome cell sensing physics"]},"model":"grok-4.3","cost_usd":0.006453,"raw_usage":{"total_tokens":2868,"prompt_tokens":520,"num_sources_used":0,"completion_tokens":57,"cost_in_usd_ticks":64528000,"prompt_tokens_details":{"text_tokens":520,"audio_tokens":0,"image_tokens":0,"cached_tokens":64},"completion_tokens_details":{"audio_tokens":0,"reasoning_tokens":2291,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"tokens_in":520,"tokens_out":57,"duration_ms":14187,"temperature":1.0,"reasoning_tokens":2291,"cache_read_input_tokens":64,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-06-27T02:05:51.864182+00:00","model_set":{"reader":"grok-4.3"},"falsifier":"An experiment in which disabling the four listed active mechanisms leaves cells unable to exceed the classic passive precision bounds would falsify the central claim.","supporting_citations":[],"review_version":1}